I would disagree that multimode flashlights are akin to McDonald's in this analogy. People don't use multimode flashlights because they're "fast, cheap, and easy" (but terrible in all other respects) like a Happy Meal, or Microsoft Windows, but because multimode is, in fact, excellent UI design. If people can double-click a mouse or their laptop trackpad then they can operate a multimode flashlight; it's consistent, predictable, and reliable. Ramping, I think, is too fiddly and imprecise unless the hardware interface was changed to include more than one button, or perhaps a rocker-switch because a single-button ramping light like the venerable Nitecore D10 is not any easier to operate than a multimode light with its double-click to go straight to minimum, double-click+hold to go straight to maximum, click and hold to ramp... oops, wrong way... let me click and hold again to go the other direction...
A ramping UI is fine for people who like them, but to suggest they are inherently superior to a traditional multimode UI? No way.