Personally I’d love to see more wider usage of S/MIME and/or PGP.
I’d rather see less. https://www.latacora.com/blog/2019/07/16/the-pgp-problem/ is a good summary about the issue and they have a shorter follow-up post about why encrypting mail in general is bad at https://www.latacora.com/blog/2020/02/19/stop-using-encrypted/
What I take issue with actalis, is that they don’t just sign your private key but you actually get the private key from them. It then depends on how much you trust the issuer.
By definition, that key can no longer be considered “private”.
I’d rather see less. https://www.latacora.com/blog/2019/07/16/the-pgp-problem/ is a good summary about the issue and they have a shorter follow-up post about why encrypting mail in general is bad at https://www.latacora.com/blog/2020/02/19/stop-using-encrypted/
By definition, that key can no longer be considered “private”.