Try filen.io. Similar concept as Dropbox but zero knowledge and encrypted. you can easily share direct (expiring (so you choose so)) links to files with or without password.
Bluetooth headset are quite problematic in Linux due to missing drivers, codecs and/or firmware. As an output device they tend to work but I've never gotten microphone functionality working on my WH-1000XM3.
In many places at least in Europe incl. where I live substance abuse is seen as a social problem first and foremost and not a criminal problem. You get support from society, like free fresh needles or safe places to use, social care and health care. Chance to get rid of the addiction and start over. Of course if it becomes a criminal problem those parts are dealt accordingly.
If you installed them using the official instructions then they are updated with the rest of the system, and modules are automatically compiled for all installed kernels.
Doesn't really matter. Musk won't let it go bankrupt.