It should be possible to use existing apps that use libusb without requiring them to individually support termux-usb.

Places where this has come up recently:

• Termux USB OTG support #1145
• Termux (Android) support pyusb/pyusb#285
• libusb support improvement termux-api#349

My proposal would be to enhance libusb so that (on non-rooted devices) it can use termux-api to enumerate and connect to usb devices. It would then be transparent to apps how they end up getting access to the usb devices that they use.