Tanks aren’t about to go out of style, though. The goal is to not let anti-tank weapons in range of your tanks - as it has been since WWII, just moreso as time goes on. Maybe ditto for ships that aren’t Soviet rustbuckets crewed with drunks, although I think even that is in question these days.
Also, funny enough, the average weapon is getting more complicated and expensive as time goes on. At least for the West, a skilled soldier continues to cost more than whatever they operate, so survivability is worth it even if it means less volume.