I'm not really on board with this thing Yathzee usually has against traditional genres being traditional for the sake of tradition. If they are, so what, plenty of people still learned to love them for what they are.
You might as well say that chess is just a really crude stylized strategy game, and it's obselete now that we can do real time battle simulations with thousands of soldiers in Total War. But why does this matter, if somewhere along the line, chess has grew to be it's own thing that people love for being chess?
If it comes down to it, all genres of everything are just traditions that people keep repeating against intuitive sense. Point-and-click adventures, FPSes, JRPGs, musicals, cyberpunk novels, harem animes, superhero comics, western movies, police procedural shows, etc.
It's the same deal with ultra-oldschool RPGs, even if only with a somehow narrower audience is taking their rules for granted.