To be fair, since we can go to +3dB out of 0dB, we could also go to 200% on a 100% scale. In the era of software it would not be completely insane to allow users to choose how their faders are marked. (It would be insane to use 3/4 of a slider's travel for the range 100% to 400%. So the locations of the markings on usable sliders would remain mysterious to %-only folks.)

Ultimately people who use this a lot would choose to become familiar with dB, as they always have. But there's no rush.