asphalt
Tassie...where tyres are flat and nights are long
I've never driven a motorcycle with ABS, so I do not understand, that the ABS can not be switching off with immediate effect.Gravelly yes, muddy-slippery no. As long as there's some semblance of grip/ bite, it's ok.
Once you have or need the 2 wheels at different rotational speeds, you're cooked. Make it switchable and have the best of both worlds.