There is no way of storing a device application (or any other data) on the TKey. A device app has to be loaded onto the TKey every time you plug it in.
For privacy reasons (and also because it’s winter :p) I no longer use them that much, but when I did use them they were mostly show-offs. I also had to be really careful not to get them wet because of how expensive they are. They also aren’t that comfortable
I’m all for decentralised networks, but they do have their flaws. I use Matrix every day, and there are a lot of times the keys need to be resent, messages don’t get sent or deleted on shaky internet, etc. Issues like this make it seem broken to normies. Signal Just Works™️
that doesnt work on newer devices