Comment by skirmish

Ditto, the TP-Link's Archer A7 firmware is a security nightmare [1] but with DD-WRT installed it is very stable and reliable.

[1] Daughter invited ~10 classmates to prepare for a science competition, and one of them had a virus (I assume) that hacked TP-Link's firmware to draft it into a botnet. WAN connection would drop every hour for a few minutes, plus unexplained internet traffic while nobody was using it. Resetting firmware did not help, installing DD-WRT fixed it once and for all.