Comment by amluto

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.