I treat HA in my home the same way I do IT systems: test everything in a non-production environment first. My home office fills this need. Nobody uses the room but me, so it’s full of all sorts of barely-working devices and hacky integrations with other HA platforms.
Things that work reliably move into the rest of the house. Things that don’t work or aren’t 100% reliable stay here. Of course, this acts as a filter that results in the automation in my office becoming worse and worse over time, but that’s fine because it’s all stuff I still want to hack on. The other result is that while I don’t push a lot of actual automation into the rest of the house, what does wind up there works pretty reliably and as a result is generally well-received.