Wiping your ass with horse shit is not quite something to be proud of.

I use Joplin with a self hosted WebDAV for syncing. Works like a charms on all my devices.

There is a public demo instance. The link and test credentials are on the GitHub page.

They have very, very different business models. Constellation size is meaningless on its own, you have to account for the satellites capabilities, orbits, and the number and needs of your customers.

This is true at 500km altitude, but not so at higher LEO altitudes.