I did acknowledge that it may prove too difficulty militarily for the Turks. And the US has proven it is more than willing to bomb Assad's forces before, so we still don't know if that translates to being willing to risk military clashes with a NATO member.
But I do agree that this is strong evidence that the US does want to maintain its grip in eastern Syria.
As an aside, anyone, including the highest levels of intelligence for any individual nation, who claims to know exactly how this clusterfuck is going to play out is a liar. Too many moving parts.