As for the USA, let me put it this way: If Trump gets elected, with the tech tools the govt has, we will see, at the very best, another Hong Kong, with anyone that disfavors the Repubs disappearing, some permanently. At the worst, we will see another Nazi Germany. He himself proposed executing people.

If you practice privacy and can teach others, your skills will be valuable to the underground resistance.

I have XM4. Supports everything except DSEE as far as I can see. Oh. Not the stuff that links to Sony either like 360.

Some headphones/earbuds are enabled in gadgetbridge.