Humans do not currently have the technology to create long term, self-sustaining closed ecosystems.

No one on earth has successfully created one, and biodome was cut short due to private equity buying it out and basically forcing the project to shut down.

The billionaire bunkers may be designed for long term survival, but they will have a finite amount of food at least. Water can be replaced via wells, electricity can be generated with SMNRs(if the billionaires even own those), and food may be able to be supplemented for a while with grow lights, but eventually the soil will deplete due to not having a sustainable ecosystem.

All we have to do is poor concrete in front of the entrance and wait.

What have you run into that sticks out to you?

I’m curious because I’ve been on Linux full-time for 2 years now and an avid user for years before, but my friend is thinking of switching and I want to know what he might need help with.