A recent 1Password blog post introduced me to DNSControl; “a platform for seamlessly managing your DNS configuration across any number of DNS hosts”.
Highly recommended if you need to manage multiple domains!
I own several domains for which Cloudflare handles the DNS and Fastmail takes care of the email. It is so nice to define this configuration once (and under version control) and apply it on all my domains, instead of manually editing this long list for each domain!
(And of course I use the 1Password CLI as suggested in the blog post)