Most things people self host are either torrent clients, HTTP(s) or are game servers. The first one can pick a port arbitrarily. The second can do host routing. The third - some of them support SRV records so you can direct the client to an arbitrary port. It’s becoming less common to need multiple public IPv4 addresses.

Nvidia controls enough of the market that more PSU manufacturers would if Nvidia needed it.

The easiest way to think about it is that the conductor is rated for the current, and the insulator is rated for the voltage. Now, once you get into the nitty gritty, they’re more intertwined than that, but it’s close enough for a surface level explanation.

Not gonna happen for me

are they just… using it till it evaporates?

Yes, but I’d say it goes further. Using it until it evaporates isn’t a side effect of some other cooling process. Evaporating the water is the cooling process.

Signal is gaining the network effect. Session is not. Don’t let perfect be the enemy of good enough.

I think the idea is that for one, the front screen can be smaller and more easily used because the main screen is bigger. On the other hand, the main screen is bigger, allowing it to act as a tablet without having to carry a second device. On top of all that, it still fits in your pocket.