I've been doing this for 30 years and sometimes I give the wrong key file on the command line by forgetting to add '.pub' to the end. Far as I remember, I've a

I've been doing this for 30 years and sometimes I give the wrong key file on the command line by forgetting to add '.pub' to the end. Far as I remember, I've always caught it before I managed to send it somewhere public, and thankfully most of my keys nowadays have a passphrase that gets remembered in my OS's keychain. But the UX is really that bad.