Can I use USB in a bootloader on the nRF52840?

[Roger Clark]

Before I try something which is technically impossible....

Does anyone know if the USB functions on the nRF52840 would work in the bootloader, or only in the application?

[SRA]

Iirc, in the latest SDK the 32 doesn't even work over UART. So the chance that the 40 works over USB seems pretty low right now.