New Vegas came out fall 2010. Skyrim was fall 2011. Elder Scrolls Online was 2014. Fallout 4 was fall 2015. Fallout 76 was 2018.
I think they should have skipped ESO and F76.
You'd think so, but I just saw something where ESO has apparently brought Bethesda $2 billion in revenue since it's release! I had no fucking idea, I played it the first year or two it was out but didn't think it was all that popular or that it had grown to that level. Apparently Microsoft is taking resources away from it, which seems stupid given the money it generates. It apparently consistently pulls in $15 million a month, I'm at a loss.
Fallout 76 is a slightly different animal. Obviously there was the absolutely awful launch, which they later were able to recover from years later to a degree. They haven't generated the same revenue that ESO has, but apparently they've seen up and down popularity since the launch of the TV show. They're reportedly bringing in $20 million a month around the months each new season is released. That's not shabby if they're running with a skeleton crew. Earlier this year I picked Fallout 76 back up after not playing it since launch. It's definitely a better game, but it still suffers from the repetitive grind that other MMOs have. At some point you max your character on Perk points, you can continue getting level ups, but they do basically nothing other than allow you to collect more Perk Cards that you don't need or can really use. There's a new season every 3 months for you to grind tasks to unlock cosmetic items and some machines/utilities for your CAMP, but the rewards aren't particularly worth the time investment. It was fun for a bit, but running the same events every day gets old.