25Gbps is available but not common. Most average people will buy 10Gbps P2MP from Swisscom, Sunrise, Salt etc., the really big companies with marketing all over the cities. Then they'll use WiFi with the default modem and not reach anything like 25Gbps.

25Gbps requires pretty unusual hardware to use (see [0] for example) and you need to pay a couple hundred francs for installation so even among the geeks and nerds, it's not common.

I have it myself but recommend to friends and colleagues to use Init7 but 10Gbps instead.

[0]: https://michael.stapelberg.ch/posts/2021-07-10-linux-25gbit-...