> trigger that sort of prosperity in Russia and we'd probably be seeing them just bunkered down waiting for Siberia to thaw through global warming.
Russia during late 2000s and early 2010s has been more prosperous than ever, yet Crimea invasion and annexation, Donbas invasion happened. No, you can't undo imperialism through money. You can make it more powerful with money, though.
> Russia literally dismantled their own empire in 1990.
No, it certainly wasn't "Russia", only some of its ruling class making that decision under pressure. A historical aberration.
Even then there was kicking and screaming, with violent suppression in Baltics. Yeltsin never let go of imperialism either with keeping Moldova and Georgia unstable and talking about unification with Ukraine and Belarus (Russia was too weak to do anything about that, though, so all in friendly manners for now).
> They aren't a top-10 power. They aren't going to reclaim the USSR; they can barely even reclaim the Donbass.
Militarily they of course are. They aren't going to reclaim the USSR, mainly because some of the countries in questions are already off limits as members of NATO. I'm pretty sure that if Baltic States were not members of NATO, they wouldn't be sovereign nations at this point of time.
> They can't plausibly enact any sort of imperialist vision.
Have you watched Russian media recently?
> They could negotiate and end to all this without too much effort.
As usual, where "negotiations" means "surrender".