Very true! I am completely ok with saying that GPG is not modern cryptography, but it gives me an important asset that I do not want to lose: I have a nice key

Very true! I am completely ok with saying that GPG is not modern cryptography, but it gives me an important asset that I do not want to lose: I have a nice key with many signatures, that means that it is relatively easy for people to check whether my signatures are mine and whether they can send me an encrypted something. As far as I know, OpenPGP's web of trust is not cryptographically broken: it is a bunch of public key signatures over other keys, and modern signing algorithms and hasing functions are supported and used. So I think that any tool that want to present itself as "GPG done better" should at least enable me to leverage the web of trust that is already in place. Otherwise, it might be a very nice tool, but for me is a very nice tool for doing something else.