So I just finished my migration. Pretty painless, not gaping holes.
One question - I still show the deprecated (legacy) Zwave integration as installed a and have a bunch of duplicated entities tied to the old integration. I assume that I should delete the deprecated integration from the integrations page, but wanted to do a santity check before I did that.
Yes, you should delete the old integration. I don’t believe two controllers can gracefully coexist.