Are you sure they wouldn't like a new interface if it was actually a real improvement?
I'm reminded of a story[0] about Norwegian doctors refusing to use the new GUI system and stubbornly continuing to use the obsolete text-based system. Were they luddites? No. The old system let them quickly navigate with the keyboard in seconds while talking to the patient. The new system required them to use the mouse, so they had to spend a lot of time focussing on using the GUI, rather than helping the patient.