Worked fine out of the box even with a real transmitter (FrSKY Taranis, using USB dongle receiver, but I assume all transmitter would work which emulates a joystick device)

I've seen only one issue when I've changed the the graphics settings to use Vulkan rendering (instead of the default OpenGL), the game first exited without any message, I was able to start it again but with Vulkan rendering it was sluggish, steam reported 60 FPS, but I wonder if it was real. Anyway, changing back to OPenGL (game exited again on setting change) all was fine. BTW: the Vulkan rendering mentioned as "beta" in the settings.

All in all very good experience on Linux.