It’s a continuum. There’s a lot of difference between hiding from stalkers and online trolls and effectively hiding within a nation state that is devoting considerable resources to find you. It’s also somewhat a function of what you’re willing to give up to hide.
Sounds good, but I suspect many of those steps won't actually work. That is, he hasn't truly vanished, maybe to online trolls who are into SWATTING.
If this sort of thing could be structured so that it could be delivered economically, there are a lot of YouTubers who would be a potential market for this sort of service. That level of security would be entirely appropriate for them and very valuable.
This certainly fits into the category of things that don't scale.