>My biggest concern about Biden is that he will supress a wave
>of young progressives taking office to be cultivated for the
>future.
>

I think it's about noting what it is the majority of americans want, you know? Dems reclaimed the house in that election overwhelmingly with more moderate candidates, who Biden has mentioned multiple times he campaigned for. In contrast, progressive candidates struggled (some reporting on it here: https://www.nbcnews.com/politics/elections/progressives-plan-victory-just-took-gut-punch-now-what-do-n933771)

I'm not saying running moderates is a permanent recipe or anything, just that the most recent midterm elections don't support that you should be too worried about Biden's effect down ballot. Also worth considering that political orientations can be dynamic too; younger folks sometimes warm a bit to more moderate politics as they age.