I’d call it a lucky accident, given the context - Russia would be harder to defeat otherwise. As for reasons - I’m guessing the usual, nobody wants to work on

I’d call it a lucky accident, given the context - Russia would be harder to defeat otherwise. As for reasons - I’m guessing the usual, nobody wants to work on this, because pay is crap and, well, and I’m guessing many folks don’t want to work for nazis. That’s also why Russia can’t manufacture tanks anymore.