Anyone who has ever had to deal with DNS management knows the frustration when a DNS zone can’t be managed by yourself. You want to make a change because you are going to launch a website, adjust an MX or SPF record or install an SSL certificate.
All matters for which you must contact an external company or person to get it fixed for you. Someone that might not respond immediately, and then you must wait. With ctrlDNS waiting belongs to the past.