First as noted, no Dynamic DNS or DNSSEC?? REALLY?? Come on.
Second as also noted, the migration is manually! You have to download a zone record and upload it, and that's after manually creating your account.
I'll be switching to Cloudflare. Been considering it for a while, but now it makes sense.
And the migration is just a sign up for a new service after exporting my zone config? They really don't care about losing customers it would seem. Easy enough, my router supports domains.google.com for ddns and my domain registration is already there, it's time for DNS to follow it.
It is not manual, you don't have to do anything... other than pay consultants to do the migration for you, of course.
/s