Starting from scratch even if everything is nearly the same since HA changes so fast it will clean out any conversions, backward naming standards etc.

I think the way my z-wave devices where named by default has changed 3 times since I have been using HA early on. HA migrated these names each time, but new devices show up differently. Also all sorts of deprecated stuff still in parts of my config etc.

I will probably be moving in the next year and plan to replace a lot of my BASE devices with more reliable options then layer in the old ones, or the old ideas with new devices.