Acting as if single payer is the only worthwhile thing a democratic administration can do for liberal Americans is pretty ridiculous.
That's my main concern right now, and I say this as someone who could benefit from something like Medicare-for-all. Everything can't revolve around healthcare.
However I will say this - if we're going to do single payer, then they better fking do it right this time, because we can't spend all our time and power on healthcare. If they fall short again, we need to move on to other issues. The world is not on pause as we squirm on healthcare reform. There are still tons of other issues that need to be addressed.