As someone who creates custom domain name applications, FUCK THEM WITH A PINEAPPLE SPIKY SIDE FIRST. This problem is on par with timezones for needless complexity and communication disasters. Companys and advertisers are now adding man in the middle certs for additional data collection/visibility. If the ciphers not cracked, changing the certs exposes significantly more failure, than letting one get a little stale.
Sysadmin used slam! It’s super effective!