10GBASE-T isn't popular because your cable runs are cut short. Costs have come down a lot on fiber. A short range SFP is like $120 or so, and short range cable

10GBASE-T isn't popular because your cable runs are cut short. Costs have come down a lot on fiber. A short range SFP is like $120 or so, and short range cables are like $3 per meter. What a lot of people do as a stopgap is binding ports together, using something like LACP. There's trade-offs of course. A 4 port 1000BASE-T card could be used to boost a few important servers.