You can move to WiFi tablets then. The hostile network boundary would then begin on your MiFi router.

Unless you outlaw alternative ROMs some devices will be not backdoored.

Central server only gives you metadata. Therevare altrrnative clients if you don’t trust the official one.

It is never safe to trust any network. And running a tight ship is a lot of work.

VPN first is fine if you don’t want your ISP and your nation state to know you use Tor.

Which asks for captcha.

We are already running out of fossil fuels (particularly diesel) so that’s a given. If we are going to see significant green hydrogen generation, it will likely be in advanced dirigistic economies like China.

It is expensive though, so not a self runner in a free market economy.

zfs has been working nicely for me for many years, for diverse operating systems including zfs all-in-one for internal NFS mount.

Well, yeah, the hydrogen solution to build out renewable overcapacity and storing production surplus as green hydrogen in natural gas caverns is dead in the water. So private households better start budgeting for sodium-ion backup for hybrid solar inverters which are island and black start capable, for when planned load shedding events start.

You need a buffer with at least 60 TWh in case of Germany. There is no economic electrochemical energy storage system for that capacity.

Except you can’t power 24/7/365 with renewable alone, so you still need gas turbine backup.

Most vintage I have is a dual-socket 1U Sparc.

It would take hours to pull the servers from a mostly full full height rack. And then you’d get a bunch of heavy obsolete servers with zero resale value.

Obviously, you host your own hypervisor on own or rented bare metal.

Please demonstrate working and economic terrestrial energy generation using He-3 fusion first.

Mitsubishi ASX circa 2020 does not have a cellular modem, either.

Technically you don’t need a smartphone. A tethered mobile device would do. For just cellular calls, there are dumbphones. That Youtube does or doesn’t work doesn’t concern me. They always ask to login on VPN which is always on for me. Thanks, just no.

Opnsense on a thin client, riser with a quad port Intel NIC.

When I briefly moved to US end 1990s I put the motherboard and hard drives in hand luggage so I only had to buy the chassis and power supply there. This earned me a wipedown for explosive traces at the control. Asking “this is because of Lockerby, isn’t it?” did not help things.