Actually, signing was one of the annoying parts of jujutsu for me: I sign with a security key, and the way jujutsu handled signing was very painful to me (I know it can be configured and I tried a few different ways, but it felt inherent to how jujutsu handles commits (revisions?)).
If you need to type in a password to unlock your keychain (e.g. default behavior for gpg-agent), then signing commits one at a time constantly is annoying.
Does "own" try to sign working copy snapshot commits too? That would greatly increase the number and frequency of signatures.