Of course it's technically possible if apple gives in. I just don't think they ever will. I'd love it if they would instead switch to something similar like and

Of course it's technically possible if apple gives in. I just don't think they ever will. I'd love it if they would instead switch to something similar like android where apks have to be signed, apks distributed via the play store are (nowadays) signed by google, but if you distribute it yourself you can just sign it yourself and the only requirement of the signature is that it must be the same for subsequent updates.