mle

I think there are a lot of ways this is technologically solvable. Imho this is an economic challenge, not a technological one.

Larry Ellisons Oracle gobbled up many great companies and open source projects and sucked the life out of them, such as Sun Microsystems, OpenOffice, MySQL to name just a few

If the power goes out there will be no signalling on the tracks, no barriers or traffic lights at level crossings, no lights or announcements at train stations, etc.

Even though a diesel locomotive technically could run with no external power, no regular train will be operating during a general power outage.

Same goes for an EMP, even though that would likely fry the diesel locos control systems anyways

I know it’s not exactly what you are asking, but on kagi.com you can increase & decrease weighting of any domain in search results. You can also create custom url redirects, which could work for cases where the url contains the same information but on another domain (i.e. redirect youtube result to same video ID on piped).

But I’m not sure if kagi fits your needs, while it is privacy focused it is a commercial product and it asks a monthly subscription fee