Isn’t it the opposite then? Since your windows will have vertical scrolls, it makes sense to tile them horizontally in order to maximize vertical space for each window, imo.

There are lots of people who could use them. Schools, libraries, poor people.

This is more a question of tolerance. We know Facebook is NOT tolerant of competitors, of the open web, of free software, etc. They cannot survive as a megacorp without a level of assurance and control that they can’t have if they’re “just another fediserver”. They WILL try to wrangle control. They WILL try to eat us all up. Why let the fox in the henhouse when you already know it’s a fox?