Russia is in a multi-year process of upgrading and re-equipping its armed forces. The crisis in Ukraine shows how urgent the program is and Russia cannot afford to be caught unprepared like it was in 1941.
Twenty million lives lost is all the more reason to press ahead. Its not possible to foresee where future threats may emerge but no country can afford to let down its guard.
This is the critical thing no matter how much money it costs. And the re-armament program will continue well into the future.
Weakness is a recipe for war.