Although, now that I think of it, Bernie's plan for a doomed M4A legislative push in the first week of his Presidency that inevitably gets obliterated in a floor vote may actually harm the chances for extracting maximalist concessions in a follow-up negotiation. In that case, you've shown the squishes and oppositional forces that there is no legitimate fear of M4A, exposing the supposed big stick to actually be a small twig, essentially calling his own bluff. Whereas Warren's position of huge healthcare expansion with the threat of full, immediate M4A looming in the background of negotiations, hanging like a sword of Damocles over the squishes and oppositional forces, might actually force more concessions out of them. She retains the threat. That's what the Obamacare negotiations were missing. Obamacare (w/ public option) was the leftmost position because there was no substantial push for M4A framing the debate. It's like why Republicans wanted a show vote on the GND and AOC encouraged Dem Senators to not vote for it.
Could be wrong though, I'm just trying to game this out.
You gonna be mad for eight straight years as Bernie continuously improves every aspect of this country.