Tbh I’ll probably keep it until it’s made redundant by macOS not having any intel architecture baked in, and it becomes my replacement iMac.The one is the beast! It'll be running fine for the majority of the tasks. I'd keep the once as long as possible and as long as latest available macOS will support app requirements.
If they stop supporting it but there are still macOS updates that support Intel, then I'll probably OCLP it too