I buy TPLink gear, but only because I check to make sure it can be flashed with OpenWRT beforehand. I may not actually do that (my router is running it, but my PoE access points aren't yet), but I make damn sure I can.

(Also, I almost bought Kasa smart plugs, then checked to see whether they could run ESPHome or Tasmota and picked a different brand instead. You always have to check, every single time!)