I have my home server behind a wireguard vpn access.

While I am no security expert, or precisely because of that, I still try to follow security best practices for the internal setup if I can.

Of course you propably do not have to be as vigilant as if your services were publicly exposed. But I believe it is still a good idea to have some “defence in depth” and not assume only one possible attack vector, e.g. what if there already is a bad actor on your home network maybe via a trusted device that has some virus. Also a plus is i guss if you ever decide to expose something later on you wont have as many issues.

As far as I know, not even that is certain. I read something about other topologies, like a donout shape or even higher dimentional topologies being plausible as well. Interesting rabbit hole but really makes you question our how we view our reality.

They like to annoy future programmers by letting them do binary tree insertion steps manually on paper. They also like to destroy your self confidence by telling you if you ever come up with an algorithm it is likely trash and someone else invented a better one 50 years ago.