Only that the FCC rails against them, and the hamsheeple also make fun of such items. Those that don't candelstinely use them on 11M that is.
My first HF mobile rig was a 10 meter Uniden HR-2510 transceiver. Even Realistic had several different models just for 10 meters. Many of these rigs are still in use. Of course, then there are the many boatanchor transmitters that had an 11 meter position on the bandswitch. I don't see people making fun of those either.