FWIW I was able to move a bunch of my Google Domains domains over to Google Cloud Domains, but not without a couple hitches:
- The default quota is 20 domains per account, so I have to wait to get an increase approved. Surprisingly, they have a happy-path for transferring a domain you already own in Google Domains, but it counts against the same quota as a new registration.
- Some domains supported by Google Domains are not supported by Google Cloud. It seems to be about “premium” pricing, not the TLD.
Hopefully they improve the experience in the transition period: increase the quota and reach parity in domains supported.
https://cloud.google.com/dns (Cloud Domains)
Google Domains competes with hosting registrars like GoDaddy.