No %#*^ing way is he saturating a 25gbit connection to download a PS5 game — not on Sony’s EMEA servers anyway. He’d download the largest PS5 game out there (Borderlands at 50GB) in a minute anyway — probably before he could reach the full 25gbit. On a gigabit connection, he could download Borderlands in under 7 minutes. If that’s too long too wait, then having a faster connection isn’t this guy’s problem.
The only use case I can think of would be bit torrent where lots of peers housed in server farms could lead to full saturation. I’ve seen download speeds at 150MB/s. That’s still a measly 1.2Gbit. But even when you’re talking about downloading remuxed 2160p files (~50-75GB) or the occasional collection (~100-200GB), I don’t see the need since it takes time to connect to the swarm and saturate those connections. Unless of course you want to seed it to the whole world.
Cool to have such big pipes, and I’m glad Switzerland is doing some good for science and proving to other ISPs that there’s profit to be had in avoiding rate limiting, but this is so wildly unnecessary.