I think Bethesda misunderstood a lot of the original vision of Fallout (e.g., retrofuturism and the whole point behind bottle caps as currency). I’m not a fallout player, I just watched vids of the earlier games and the new ones in an attempt to get interested in it, so take my word with skepticism.
But yeah. They’ve made it into their own product now and it could just be that Cain would have done things differently. But it’s not like they’re pumping them out. You get one numbered game per generation, so I think it’s fair to say there’s going to be some thoughtfulness before you see Fallout 5. As long as there’s no rush, which I think Starfield buys them a healthy amount of time.