Yep, on gravel at low speed. Very weird sensation. No idea how well it works on pavement nor how that would feel. Optimately, I'll never find out. Pragmatically though, it seems inevitable given the level of driver education necessary to get a license to drive a cage. They're out to kill us you know...
It's not the technology, it's the lawyers. If anything at all goes wrong with the ABS "kit", the manufacturer gets their shirts sued off. Especially in the USA.
I think a Norge chassis all tarted up with the tank and seat etc of a classic spine frame would be spectacular. Troublesome to adapt I'm sure, but boy, that would be a sweet bike. You'd want to complete it with Ohlins suspension though to completely finish the job.