My ZZR did in two sets, both times whilst touring two-up, I fitted PFM's and did another tour with no issues, a mate bought these discs (as his had warped - along with 30% of ZZR owners on the forum) and he has also since done a lot of miles with no issues.
My mates GTR did in set of discs number four on this trip, as have many other GTR owners.
I suppose every ZZR and GTR owner on the planet obviously does not know how to ride, or have forgotten as I had never knackered a set of discs in 100,000 miles on other bikes.
The GS clutch loses pressure and you have to pump the lever or over time you cannot disengage the thing, no problem on winding roads / around town, but after 1.5 hours on the motorway in top it is difficult to even change gear.
I think this is going way

as my FD is still intact, and hopefully will stay that way until I change bikes.
OK 3 small niggles on one tour maybe considered good by BMW standards, but my last bike managed 3 tours with no issues apart from the discs, and with them replaced with quality items I would expect it to do many more tours reliably, the new owner has already taken it around Europe with no problems.
Back on the FD subject my last bike had covered 15k on the chain which was still in fair condition, which is much more than many FD's have lasted, and probably a good 50% of the average FD life with a replacement cost of about 1/10th of that of an FD.