The difference would be the expectation of the person going into the role with a skillset in the publicly available domain expressing competence rather than hav

The difference would be the expectation of the person going into the role with a skillset in the publicly available domain expressing competence rather than having the company train them up. Rather than "we're going to invest time and training into this person to get them" it will likely move to "we expect these skills from the applicant." If the front end developer wants to learn back end, they will need to do it on their own rather than applying as a junior position and learning as they go. If the sysadmin is moving to an environment with kuberentes, they better have explored it on their own home lab. I expect companies to be much less willing hire someone, and have them do some training no longer being able to make sure they stay after they've skilled up with the associated threat of training reimbursement.