That assumes that is an effective tactic. Call me cynical, but I kinda doubt it is. The Democrats have always been a circular firing squad (the Republicans have their occasional moments at the firing range as well).
Have the never-Trumpers shifted the RP? Nope, not a bit. Well young progressives shift the DP? I doubt it - too many Democrat voters don’t agree with young progressives. Even on this board I’ve seen “centrist Democrats” essentially pissing and moaning about the DP being “too woke” and throwing future elections away for this reason or that. Unlike with the never-Trumpers, there isn’t a clear losing side here. The DP will muddle along as clumsily as ever, never fully satisfying either the center or the left. shrug
The counter-argument to it being the same is of course the notion that a second Trump presidency would be vastly more dangerous and damaging than the first. Which folks are free to accept or reject as they will, but personally I DO think the risk is much higher.