Started seeing consumer 10Gbps back in 2018 (in Sweden). The problem was there wasn't many consumer router devices around back then to support that kind of link. It might have even been unheard of, so one ISP solved it by designing their own custom device to specification - just so they could offer 10Gbps asap.

Sonic in the Bay Area offers 10Gb symmetric at that price, no cap. I upgraded from their 1Gb plan to 10Gb with no change in price.

Unfortunately, I’ve since moved to another part of the country, with much less enlightened ISP options.

No caps, no cap :P

I even made my own router because I didn't like the consumer options available: https://danangell.com/blog/posts/10gbps-router-for-fun/

I have 5gbps available at my house, but what would I use it for? Symmetric 1gbps is fine for me.