While I agree that OSMand to Bolt is a niche feature, the transfer of GPX files while in the field is a vital capability. If I'd had my OTG cable, I could have used it again yesterday to transfer a GPX file. My friend with the Elemnt Bolt did not load the route for our group ride and showed up expecting to do a familiar course. She took a wrong turn and almost got lost. That's twice now. It's more than a niche feature when you can be Johnny on the spot and just transfer files without a data connection to any bike computer.