I don't think it will take 15 years to do this. The scope of so-called LLM Safety is growing rapidly to encompass "everything corporations don't want users to talk about or do with LLMs (or computers in general)". The obvious other leg of this stool is to use already-built gatekeeping hardware and software to prevent computers from circumventing LLM Safety and that will include running unauthorized local models.

All the pieces are ready today, and I would be shocked if every LLM vendor was not already working on it.