WiFI 6e
My understanding of WiFi6(e) is there can be a 3rd 'backhaul' channel (either wired to the AP or wireless) that takes the load off the uplink from the device, thus freeing the downlink to the device and increasing the bandwidth.
I am currently wiring my daughter's 100 year old house that's been gutted to the bare framed walls to run PoE to the APs and then backhaul from the AP to the router using that same Cat6 cable.
Will probably use TP-Link's tri-band Mesh Business solution as the Home solutions are only dual-band (with exceptions). Yea it's expensive but it'll be future proof... at least for a few years.
Biting the hand that feeds IT
