Got these and hated going to app, but knew most mesh option used one. Web UI is available but not really complete in terms of features/management. Reported a number of bugs and watched to see if any updates. And now couple years later there are clearly no updates forthcoming. Now I am finding my wired and wireless speed choked. I changed cable plans to a faster one, upgraded modem and tested speed with a laptop at the modem got ~950M of a 1.2G plan, close enough, but I plug in the router, and connected devices are only getting ~225M severely choked and basically what I was getting before. I think it was the choke point even with the slower service/modem. Cycled devices still the same. 

I check here and find similar issue reported all the way back to 2020 under thread "Deco P9 set as main has 100% CPU load Vs. a Deco P7 that only use 20%" but that one is now locked with no answer addressing the issue. From what I can tell the device is the limit. Shouldn't be limiting that low based on the hardware, so must be a bug, but find it doubtful TP link is going to address given the previous thread.