My current setup which includes Netgear R8500 (main), R7000 (wired AP), AC2100 (wired AP), RT-AC1900P (AP, connected in a barn via powerline Zyxel PLA6456 G.hn Wave 2) and it's quite stable. However, 2 latest firmware updates for R8500 had DNS resolving issues, so I'm staying with older firmware, which don't have any issues. All the routers are quite old, around 3-6 years old. Should I upgrade to Wifi6? I'm looking at buying used Netgear RAX80 or RAX200 main and 2 EAX80 APs. I like Netgear's hardware, the software is a bit dated, but it meets my needs so far.