Well yes, signing every commit is useless. He did not however, at any point during that exchange, express the idea that commit signing is a useless activity. And that is what I was referring to.

Currently Git seems to be very much integrated with GnuPG and the same goes for GitHub's UX sprinkles over the signing feature. That is what I'd like a decent alternative to.

I considered using OpenBSD's signify but it does not integrate as nicely as GnuPG signing so I'd basically be rolling my own mechanism (which is fine I guess, but feels subpar)