So, my big dilemma can be summed up in one work. Supertanks.
There are a bewildering array of paper supertanks that the fall of the USSR nipped in the bud. These, both western and eastern, range from conventional upgrades of previous-gen tanks (many of which were actually made, at least in prototype) on one end, to ultra-exotic “Crew of two and they’re both in the hull” designs on the other. 140 and 152mm monster guns, uncrewed turrets with innovative autoloaders, the list goes on and on. They’re interesting to see, and I’m wondering “If I’m making a semi-grounded fictional supertank, what real one should it most resemble?”
And yet, for one of my main antagonist groups, the question of supertanks gives way to the more important one of “are they the kind who’d have large formations of tanks at all, be they surplus or super”. That’s the question I should be asking.