To be fair, editing DNS records has nothing to do with being a registrar. Free DNS servers aren't even a service all registrars provide, and they're one most customers don't use -- they use their web host's. For anyone building a tech business, you have no excuse for tying your DNS service to your choice of registrar.
Most people running a tech business use an unmanaged VPS or dedicated server. Running your own DNS server is kind of a pain—so, when all registrar run their own DNS servers and most have pretty good UI for record management, why not use them?
For what it's worth, I use domainsite.com. They're a solid and cheap registrar, and though their UI isn't the prettiest, managing domains and DNS records is fantastic. I use them for everything.
