I do not agree with this assessment.
First of all, the article still speaks in terms of "reducing" rather than leaving the number of American forces in Afghanistan by November 2020.
This is actually a lame statement compared to many that former presidents, the current president, and aspiring presidential candidates have been making for seven years now... public declarations of intent to get out of Afghanistan completely.
“By the end of 2014, the Afghans will be fully responsible for the security of their country.” —Barack Obama, 2012
“We should leave Afghanistan immediately. No more wasted lives.” —Donald Trump (via Twitter), 2013.
“I would like to just get out. The problem is [Afghanistan] just seems to be a lab for terrorists.” —Donald Trump, to Tucker Carlson, 2019.
“We will withdraw. We have to.” —Pete Buttigieg, 2019.
Here's my take on this.
The US will never get out of Afghanistan. Never, not for any reason. Two presidents have had the chance (one of them actually did pull out of Iraq completely before sending troops back in with the rise of ISIS.)
Reasoning:
1) We talk about Mackinder and Caroe and yet ignore the obvious. The US presence in Afghanistan has been an accepted status-quo, a fait accompli of American imperialism for two decades now. Afghanistan was invaded at a time when China was still seen in DC as primarily a trading partner, and Russia was still recovering from the Yeltsin era. Today, with the SCO dominating all of the World Island's interior, and an increasingly US-hostile EU finding common ground with Moscow in the Heartland, a presence in Afghanistan is indispensable to the US.
If the US leaves Afghanistan now it will never regain that foothold. Ever. And it is more critical to US geopolitical security than it has ever been. Why else would two Presidents of the US, supposedly the men in charge of US policy, turn out to have been speaking 100% empty words about withdrawing from there over the last decade? Answer: clearly, there was never any intention to leave.
2) Trump may be partially telling the truth when he talks about "reducing" official US military presence in Afghanistan by 2020. He does need to sell the *appearance* of ending the Afghan war as an electoral issue. But that is very easily achieved while retaining force levels there.
This is an era of "fake news" unlike any the US public has experienced before. Americans on both sides of the political divide believe exclusively in ideologically-driven narratives to the extent that they've actually become averse to verifying facts... even facts about what actually happened in some nearby town or state. Combine this with the prevailing level of ignorance about world affairs among the US electorate, and do you think Trump's base voters will have either the inclination or the ability to figure out what is really going on in Afghanistan? Not a chance. They will believe what Fox News and OAN tell them.
To provide some supporting TV bytes and photo-ops, some troops will almost surely be rotated back from Afgh with high fanfare. In fact, even redeployment of official US military units to Afgh may be frozen.
In their place will go thousands of US military contractors. The proposal to privatize the US military presence in Afghanistan, from Erik Prince of Xe (formerly Blackwater) has been under discussion since Trump first took office. Prince, by the way, is the brother of another Trump crony... Education Secretary Betsy de Vos. The whole thing fits perfectly into the Kangressi-Khandaani scheme of patronage which seems to be the primary driver of US policy under the Trump administration.
So basically the US will continue to stay in Afghanistan, replacing official military personnel with equal (and perhaps ultimately, greater) numbers of contractors. With no Congressional oversight, no ROE, no Geneva convention to follow, they will mimic the 4GW template established by Putin's "little green men" in Crimea. As such they may end up being far more effective than the actual US military was.
And of course, these contractor units will be fully equipped with the same kinds of armour, artillery, naval/air support, intelligence support etc. as their US military predecessors were. Including the maintenance of the same logistical supply chain that goes, inevitably, through Pakistan.
This brings me to my third and most compelling reason for believing that the US has no intention of leaving Afghanistan, which is:
3) WHY, if the US was actually planning to get OUT of Afghanistan, would it have any need whatsoever to engage comprehensively with Pakistan?
I mean, if you're going to get out, just get out, no? Like the US did from Saigon in 1975. Sure, to manage the optics you might need to throw a one-time bone to Islamabad-- even approving a single IMF loan tranche would cost the US very little while temporarily alleviating economic pressure on a desperate Pakistan.
But comprehensive engagement? Flirting with the idea of "arbitrating Kashmir dispute", which NO American President has had the ba11$ to even suggest in public after the Pokhran II tests? Renewing military aid and servicing F-solahs? These are the hallmarks of a long-term client-state relationship. Yeh sab kyaa hai bhai?
The answer is clear. The US wants to continue its post 9/11 relationship with Pakistan, because it intends to sustain indefinitely its post 9/11 presence in Afghanistan (with the option to ramp up even further if required). The Krrachi route must remain open.