I do not think PKI will survive the 47 day change. I am not sure the CAB will survive that change. It seems extremely apparent the people who made the decision have neither any relevant experience in IT nor any practical understanding of security, and I think they've finally flown too close to the sun. Automated renewal is... probably about a decade or two from being supported well enough to be an actual answer. In o…
???
All my servers use certbot and it works fine. There's also no shortage of SaaS/PaaS that offer free ssl with their service, and presumably they've got that automated as well.