Earlier quoted context omitted.
Well good thing everyone using the provider is using an open protocol and it's stupid easy to switch
Which free CA should I use instead of lets encrypt that has same browser support?
ZeroSSL from Austria also has a limited free tier. https://zerossl.com/pricing/
I mean really, if you use lets encrypt for anything that runs in a production environment, the responsible thing to do is build a fallback to switch to another provider in case LE has a bad day (or hits a brick wall and needs to say, enforce export restrictions).