Thanks for this. The issues I’ve seen with 7756 and 7968 is with AX clients that slow to a crawl. Disable / re-enable WiFi - then it works for a few hours.
I don't have any AX clients, just AC and N.
If things slow after a certain time then the first thing I would do is make sure that channel is set to a fixed one, avoid DFS channels, and limit the 5 GHz band to 80 MHz (as 160 MHz requires way too much bandwidth, meaning the chances of conflicting with other local Wifi APs is very high, in addition to requiring the use of DFS channel space).