It would be nice to have some sort of mini-USB accessory that could bluetooth-enable an ErgodoxEZ keyboard.
I found some related discussion here: https://www.reddit.com/r/ergodox/comments/8kugs5/is_it_possible_to_add_bluetooth_functionality_to/, but that thread has been archived, and there's not yet a clear solution yet, so I'm moving the discussion here. The stackexchange format is better for such discussions anyway.