> Well, one of the "challenges" is the one in a different comment: most registrars don't allow fine-grained control over who can update what DNS records.
Afaik, every major registrar allows you to add an NS record for the _acme-challenge subdomain, allowing you to put the _acme-challenge subdomain on a custom, self-hosted DNS server.
That in turn allows you to make the permissions as specific as you'd like. Personally I just run powerdns in docker for this.
