Re: I think the real reason PGP succeeded...
A key which expired every 6-12 months and had to be replaced
What part of the S/MIME standard do you believe requires this?
Encryption was super slow
An implementation issue. This has nothing to do with S/MIME itself.
I drove a Buick once. It wasn't very good. Therefore all sedans are terrible, and everyone should drive pick-up trucks instead.