I am so annoyed by anyone saying something is "dead".
I tried to use S/MIME. I really did. Went to those sleazy web pages of companies that issue certificates, was told I'd need to pay for various certificate products. Tried a free option. Tried to load the cert onto my YubiKey, tried using it in Apple Mail…
The conclusion: it is by no means easy or well supported, and requires you to deal with those sleazy cert-celling companies.
I tried to use S/MIME. I really did. Went to those sleazy web pages of companies that issue certificates, was told I'd need to pay for various certificate products. Tried a free option. Tried to load the cert onto my YubiKey, tried using it in Apple Mail…
The conclusion: it is by no means easy or well supported, and requires you to deal with those sleazy cert-celling companies.