main issue maximalist mindset (in any of the above 3 cases, and in general) invokes though is that it assumes that what is best for the maxi is best for everyone, indiscriminately.

one term I've happily stolen from Meni Rosenfeld is "minimaximalist". I think he might have said it as a bit of a joke, to allow conversation to veer away from bitcoin vs altcoins towards game theory. Once it accepts that there are intricate payoff matrices and possibly even equilibria between nondeterministic strategies, the "maximalist" ideology becomes a lot less moralising and normative.