My friends and I had something along those lines around the early 2000s built with Linux firewalls and freeswan IPSEC tunnels. I sure do miss the old vibe and chaos of the early internet.
Bit by bit the tunneled WAN thing sort of became irrelevant as we built more stuff as internet facing services, to the extent that the fun parts were more likely to be installed in a datacenter somewhere than sitting on the LAN at our houses.






Two of the things in their list of “Hardware and Driver Issues” look way false from my experience.
Nvidia compatibility had been getting steadily worse on x.org for the four or five years prior to the switch to wayland. It is getting steadily better on wayland now and I would pick wayland from a stability point of view right now.
Multi GPU setups are night and day so much better on wayland. I look after a few different wacky multi monitor setups and the support for them is so much better on wayland, particularly 7+ monitors across multiple different physical GPUs, mismatched refresh rates, mismatched sizes, weirdo physical layouts and monitors that are being turned on and off during a session work considerably better.