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Sysadmins slam Apple’s SSL/TLS cert lifespan cuts
(www.theregister.com)
This is a most excellent place for technology news and articles.
There's lots of equipment that can't accept certificates automatically. If they can, it might be in a closed off way that's difficult to impossible to reverse engineer. If you can, that's still a lot of skill and labor, which drives up the cost. They also might find out that it would be insecure to do it automatically.