I don't use 25GBit per se. I have it available and am not limited by it in any way. It also includes a fixed /48 IPv6 Prefix where I can also control reverse DNS. I self-host mail, "cloud" storage, photo backup, VPN and private DNS etc. for my family.
It's just that there is no need to artifically limit access to the internet.
You can also have 1Gbit or 10Gbit if your infrastructure at home doesn't profit from 25 Gbit However their infrastructure stays the same as all their switches have 48 25Gbit downstream ports and 2 (or 4 according to the effective usage) 100Gbit uplink ports to their backbone. You will also pay the same monthly price if you choose a slower line as all their expenses stay the same (except the optics, which you pay as a sign up fee)