> Like surely all the big players have updated their networking equipment by now

My home isp can't even do symmetrical gigabit, let alone ipv6...

That's extremely common unless on "active" fiber (vs GPON, DOCSIS3, DSL, most fixed wireless, satellite, mobile, etc.)

Your wifi isn't symmetrical either.

	▲	Hikikomori 2 hours ago \| parent [-]
		Those are designed to have static asymmetrical bandwidth though, *dm split gives ISP side more of possible shared bandwidth. Wifi bandwidth is shared and dynamic so client can use all of it.