Been able to use rPis as a desktop for a while now. The 2s and 3s weren’t particularly pleasant but it was doable. The Pi 4 8GB with an USB3 jump drive as root partition was a lot more pleasant, at least until you hit thermal throttle.
Right now though, there are more powerful options in the same price point, once you account for power, storage and optionally, a case. At least for desktop and home server use.
The Raspberry Pi’s just aren’t the go to hardware for the home lab anymore. Probably won’t be again unless the price comes back down on the Pi’s or the price on new and used amd64’s goes back up.