I have and love my RT-AC87U router. Been a solid performer for a number of years. I now use it as my main router/firewall and guest network and have the ZenWiFi XT8 as my mesh wireless configured in AP mode. I haven't upgraded the firmware for awhile now due to it not being supported but concerned more and more about security vulnerabilities. The only reason I haven't gone back to the ASUS firmware is I have configured VPN on it for most of my outbound traffic and last I checked that was not supported. Just wondering what others like me are doing? Thanks in advance!