Often struck me that thwere's plenty of innovation with these hings, it's actually the market, and the general public that take a while to find such things 'palatable' 4WD is a bit of a case in point
4WD - that's just for military vehicles!
Land Rover 1948 - fine, but that's all it can be used for
Jensen Interceptor FF - nahhh, that's silly, a 4WD sports car? Why?
Audi Quattro - ok, so now a 4wd sports car is ok
Senator 4WD - ha, a 4wd saloon car, don't be daft, that's just silly
Cavalier GSi/Turbo 4x4 - ok, so a 4wd saloon's ok, so long as it's fast
BMW x-Drive/Merc 4matic etc - ok, so 4wd saloon's a good idea, then, fair do's
Toyota Rav4 - on off roader that's only two wheel drive? That's ridiculous!
Mokka/Rav4/F-Pace/a dozen other Chelsea tractors - 4 wheel drive? What's that? I like it because it's an SUV, and that. What's SUV mean?
Now most people don't car about their '4wd car' actually having 4wd, it's gone full circle, in many ways.
Enough socio-automotive claptrap...
As far as I'm aware this system is different to the GM one used in Cavs Calibras that famously died if your tyres weren't replaced as a four, not GM but Fergusen, correct?