[rentzsch]

I think this is Langley's post tptacek is referencing: https://www.imperialviolet.org/2012/02/05/crlsets.html

[tptacek]

Yup. So soft-fail revocation checks are like a seat-belt that snaps when you crash. Even though it works 99% of the time, it's worthless because it only works when you don't need it.