I was afraid of this. I have been running Z-wave devices for a few years and haven’t touched them or the integrations since. I found the migration wizard, and started it.
Fifteen minutes later, Home Assistant had stopped. I waited about ten minutes and HA was still unresponsive, so I connected with SSH and was ready to reboot the host when HA started working again. After which, the Integrations page was unchanged. The Z-Wave integration was still showing “depreciated” and the zwave: lines in configuration.yaml were still there. I read the manual configuration that a reboot was necessary, which explained the reboot in the migration wizard- but ten minutes?. Thanks for the warning.