There is the 2.5 and 5 GbE standards (https://en.wikipedia.org/wiki/2.5GBASE-T_and_5GBASE-T https://en.wikipedia.org/wiki/2.5GBASE-T_and_5GBASE-T ), where 5 Gb

There is the 2.5 and 5 GbE standards (https://en.wikipedia.org/wiki/2.5GBASE-T_and_5GBASE-T https://en.wikipedia.org/wiki/2.5GBASE-T_and_5GBASE-T ), where 5 Gb is specified for Cat 6. But yes, previously there wasn't much point to it. Cat 5e is good enough for 1GbE, and for 10GbE you need Cat 6A.