If this paradigm catches on there's no reason you won't be able to do the same thing with your own infrastructure. I know this is a straw man because I can't k

If this paradigm catches on there's no reason you won't be able to do the same thing with your own infrastructure. I know this is a straw man because I can't know what sort of infra you're imagining, but I suspect a lot of people would be more comfortable with their builds stored on S3 under the scrutiny of their security team rather than on their engineers' laptops.