Comment by amluto
10 hours ago
I've had very impressive success running upstream OpenWRT on TP-Link hardware: I have Archer C7 access points running with literally years of uptime.
That being said, for any new application, I suggest using at least an 802.11ax AP, because cheap 2.4GHz devices that support 802.11ax are becoming common and using an 802.11ac router means that your 2.4GHz devices will be stuck with 802.11n, which is quite a bit less efficient. Even if you don't need any appreciable speed, it's preferable to use a more efficient protocol that uses less airtime.
Honestly if you're not invested in maybe Ruckus or Aruba, I don't think there's much better than OpenWRT on a decently supported AP. I had a bunch of the C7s with OpenWRT and they've been totally bulletproof. I only upgraded to R650s recently and it's not clear beyond maybe the antenna setup and the fact that it's ax now that it's much better.