Honestly, I'm a little scared with how loud my PS4 Pro gets playing some games, and I've still got quite a backlog... think I'll just be shifting to playing my backlog on the PS5, better performance and no jet engine in my living room is a nice enough plus to get one right away lol :P
Good gravy, clean out that PS4 before it cooks. At least get the vents if you're not going to open it up for a proper cleaning.
I do clean the vents pretty often actually, although I've never opened it up because I don't feel confident enough to do so, even after watching tons of videos on it, lol. It's not every game that makes the noise, the last game I can think of off the top of my head was Ni no Kuni 2 when I played it earlier this year... also just recently finished Resident Evil 2 and the fans did kick in a few times but never a constant thing, and they calmed down after a few minutes and that was it. It also seems to happen quite a bit on Dreams too, lol. It's sort of on a per-game basis... lol.