I don't like the idea of Squarespace becoming a registrar, so I moved my domains over to Porkbun at the suggestion of the friend and have been quite pleased with them.
I recently started using NamesCheap.com mainly because a domain name's registration details (that show up on Who Is?) are kept private and that's included in their base price.
Cloudflare here because their pricing is good. But they definitely have a limited set of features as far as domain registration goes.
For example, you can only register one domain at a time.
I'm looking at cloudflare, which is much more dev oriented
Porkbun.
I switched to Gandi.net . I'd originally wanted to move to AWS Route53, but they don't support the TLDs for some of my domains. Gandi supports all the domains I have. I was between them and Porkbun, and what tipped me towards them is that they have a 1st party Terraform provider ( https://registry.terraform.io/providers/go-gandi/gandi/lates... ).