[Ayesh]

ACME protocol is fairly straight forward to implement, and you can easily write your own implementation with existing code (OpenSSL, Apache/nginx, etc).

With many commercial registrar's, although they offer a valid and long certificate, their technical aspects aren't very good. Many CAs don't support ECC certificates, the must-staple flag or CT SCTs embedded in the certificate.

I work a lot with web PKI, and every time I have to deal with a CA that's not LE or Digicert, I sigh out loud.