Talking of Gran Turismo; I've got the first 6 - and they're good, but I think it's massively overrated. And far too many similar road cars. Why? I'm really only interested in the motorsport cars.
I recall a magazine review from back in 1998, and they reckoned the original Colin McRae Rally was a greater challenge than the first Gran Turismo; I think they were probably right. Car damage, night stages, fog, tyre choice for two completely different stage conditions, etc
I hate games like Gran Turismo and Forza Motorsport these days. I think their time has passed. Big games with hundreds of cars, in-depth career stuff, road/race cars spanning decades and different categories, they're all well and good but Forza/GT don't offer the 'sandbox' experience you need to make those kind of games worthwhile because they're so tied in with their own history and want to offer you their own version of whatever you do, which isn't satisfying unless you're a proper aficionado of the series itself.
And most people aren't. Most people are racing fans, rather than Gran Turismo fans. If you're going to give us a sandbox-type racer, give us one where we can set things up to our liking - choose the grid, choose the liveries, choose the qualifying format, choose the points system - actually set something up that resembles what we want. rFactor, Project CARS 2, Assetto Corsa, etc etc just let you go out and race whatever you want in whatever way you want because they're not bogged down in their own history and they're designed for motorsport fans rather than fans of the series.
GT/Forza might have just as many cars, tracks, etc, but they limit you and never let you forget that you're playing a game. Time has moved on, technology has moved on - these are fake 'sandbox racing sims' that actually, for all their pomp and self-reverence, don't let you do much more that select a car, select a track, and race the way the game wants you to. So they're practically worthless as a 'tool' to create the kind of race experience you want, and in 2022 are pretty boring games to boot.