Winds me up all this crap about 'riding modes'
Some technology is useful, some utterly pointless and riding modes are the latter IMHO
The bike is fitted with a throttle to regulate your speed FFS!
I bet there's even a waiver in the owners manuals for bikes with these fitted to say you can still fall off in 'rain' mode when it starts raining!!
Not so, though I haven't read the owners' manual for the new 1200, not least as I do not own one, nor a GS of any sort.
As the post from 'stubox' suggests, it probably does 'boost' (for want of a better word) throttle response over wrist action, of which there is plenty in this section I grant you.
Of more practicable use perhaps - and definitely on bikes with considerably more power than the 1200 (WC or otherwise) - is that it enables the rider to 'drive' the bike harder in less than ideal conditions, not by cutting the power (though it may do on the 1200, I don't know) but by altering the shape of the power curve.
We all know that the transmission of power ('drive') steadies a bike, forcing the back tyre into the road. That is as important in the wet as it is in the dry, maybe more so. It explains why GP - and other race bikes - have altered and switchable power maps, linked to assorted other electronic limiters or aids, so they can 'drive' the bike harder, more of the time. Now, I am the first to admit that even a well ridden GS is light years away from even the poorest CRT to line up on the start line, but the same basic principles hold true. Twat suit or Dainese leathers, Lidl carpark or Assen, the physics and basic mechanics are much the same for both riders.
Did everyone crash in the wet before? No. Did some potter about, frightened to unleash the 100 odd horsepower? Probably yes. Did their terror result in more selfimposed problems for the bike? Definitely, yes. Electronics is their saviour, just as it is for Mr Rossi etal.