Sergey Kozharinov

Windows: “We dropped support for that thing you bought brand new 5 years ago”

Linux: “We are considering dropping support for something that has existed for longer than you had”

It doesn’t make a lot of sense for LetsEncrypt to spend time adding support for such certs, since both a domain name and a cert from another CA are cheaper than buying an IPv4 block

certificates can only be obtained for domain names

That is not true, nothing prevents it on the technical side, and even some trusted CAs sell them under certain conditions

Not until there is a massive data breach that leads to very serious and obvious real world consequences