Maybe late to the game (no pun! :)) but ok.
I must say that my last console was a PS3, then I played on steam 2 or 3 times a year, now I was lend a PS4 by a friend cause I wanted to try some exclusivity but is it normal to install 20-30GB even when you own physical game ?
It was already a thing annoying back in the day on PS3 for some game (GTA 5 being the worst as far as remember) but here, it is getting ridiculous and seems to be default behavior for most games.
On PC, which is mostly dematerialized, why not, at least, you can use your computer in during the time but I don’t expect that from a console.
Not all but some do. It depends on the developer. I think there is a website that lists which games need to download additional data. Just search for it.
Half right. They all need to be installed, as in run from the hard drive and not directly off the disc. Some games require you to also download even more content, as in, the disc doesn’t have all the data needed to run the game.
TIL