You don't have to worry about [filibuster nuking].
I can't really bring citations to this for various reasons, but there actually is a pretty good likelihood of it (at least, that's the current direction the congressional wing of the party is going).
In short: if Dems get a trifecta, they'll be under a
huge amount of pressure for post-Trump change/reforms, and the only way they'll be able to do that is if they nuke the filibuster and go ham. With moderate Dems they'll still need to be somewhat careful to reach majority votes, but for the bigger democracy issues that'll be less of a barrier than, say, major climate legislation.
In turn, the activity will likely face ire from the expected court composition, which will in turn create a crisis similar to the 1930s where the court will have to choose either to adapt or face the wrath of the other two branches combined. (At least, if they haven't already changed the S.Ct. by this point.)
Now, if Biden wins but Republicans keep the Senate, then things may well stay in MSH's aforementioned stasis.
For what it's worth, I used to be pro-filibuster and am now thoroughly ambivalent, in part for the reasons MSH describes. I used to fear the volatility that a lack of filibuster could lead to, but if Trump marks the future of the executive branch (in terms of the latest stretching of executive power, at a minimum) then that volatility is here regardless.