Too big to fail: It's not just for banks any more.

If LE is compromised a few times and some fraudulent facebook.com or google.com certs leak out, how long before Firefox/Chrome/Edge blacklist their root cert like they did with Symantec[1], and end up breaking half the internet?

I understand that ACME is an open standard, but can someone point me to an alternative ACME provider that isn't "please call us for a quote" enterprise-grade?

[1]: https://blog.mozilla.org/security/2018/03/12/distrust-symant...