You need to understand that you are a very unusual case. Most people can't get 25 Gbps for a connection, it's 1 Gpbs at best. Most people, even most technical people, are not running a 25 Gbps home network. You have specific needs for speed and that's fine, but they are not commonplace and most people will be served just fine with SATA drives.

I agree with you, but we're talking about a device that I'd consider keeping for 10+ years. Actually I have some Synology NAS lost somewhere that I occasionally use, and while I don't trust exposing it to the internet (never have), it still serves files fine. With this expectation it's not absurd to get a NAS that still handles a bit more than the current speeds.

Just to add a datapoint: I could also get a 25Gpbs connection in Switzerland. Actually checking that, I'm realizing that I could upgrade without paying more (maybe just a setup fee, less than 50USD).