In May 2016, 5 years after Skyrim was released, it was valued at $2.5 billion, now it's being bought 4 years later for $7.5 billion.
I appreciate some Bethesda fans have a weird agenda, but you are wrong. Also, Starfield has been written in an overhauled engine, so again, wrong[1]. Although to be honest, it's probably the same engine with updates and they're just saying that to try and stop the small minority of rabid fans that keep on harping about their imagined deficiencies of the creation engine with every new Bethesda game. That's then always a massive hit.
[1]https://bethesda.net/en/article/4IwKWIj174Cb2QNTTtBAEb/todd-... - paragraph 9 "[The new console cycle has] led to our largest engine overhaul since Oblivion, with all new technologies powering our first new IP in 25 years, Starfield"