(13 minutes in)
In terms of long JRPGs, it took me like 400 hours (unknown how much was idle but it was like 3 months) to beat all 4 routes in Fire Emblem: Three Houses. To be fair I was the kind of person to explore everything every month, talk to everyone, do everything, meticulously plan out what I was going to do that month/chapter and think through the battles themselves a lot. But even without all that the game has /a lot/ of content and I loved it but it is certainly a lot for people to go through.
In shorter games, Persona 5 was over 100 hours for a first playthrough, like 200 for platinum trophy/NG+.
Dragon Quest X1 was... I don't quite remember but it probably got close to 100 at least? (did not platinum)
Pokemon Shield was much shorter at.... I want to say like 30 maybe? Possibly closer to like 24.
3 Houses was the only one where I really thought things might have been dragging at any point but only because it was multiple routes and /I just want to see everything/