Just remember that you are changing the “backbone“ of your network as you remove devices. It’s pretty easy when migrating from one hub to another to end up with two networks that don’t work well because neither one has repeaters in the right place. So you have to do some physical planning if you migrate slowly. I’ve seen people try to migrate a few devices at a time and decide the new hub was terrible because things which worked well in the old configuration didn’t work in the new, but it was because they hadn’t brought over enough repeaters yet.