25GBASE-T and 40GBASE-T, along with Cat7/Cat8 were dead on arrival

10GBASE-T already has stringent requirements, network cards that get very hot and more.

But if you insist, we have 800Gbps already, but it’s only for backbone connections

10Gbps SFP+ used is dirt cheap

25Gbps with SFP28 is a somewhat the standard for DC deployments as an in-between for 10 and 100 Gbps.

40Gbps serves no use except being cheap homelab crap

100Gbps is still pretty good and the max you’ll see on a server (example, SANs) but also costs a lot more

more and either you are looking at either backbone links or AI