During my all to brief stint in 'the industry', hydraulic disc brakes were the most frequent issue with customers. When the warm weather hit in March, we had loads of bikes with expanded fluid and jammed on calipers.
Leaky seals were an issue, expanding pistons and the most common: oil saturated pads where the customer allowed spray lube to contaminate them.
New bikes went out perfect, customer puts bike in car, bangs disc, customer comes back a few days later complaining if rubbing or squeaky brakes because they've bent the disc or not refitted the wheel properly.
I could go on.
I am happy with my own brakes whatever they may be as they are set up properly, unfortunately not many can be bothered to do that.
I'd love to hear from anyone on this site who uses hydraulic disc brakes who hasn't been able to ride their bike in warm weather because the fluid had expanded too much. Likewise, given that both cars and motorcycles use the same system, surely this must be an issue for them aswell?
Oil saturated pads where the customer allowed spray lube to contaminate them? User error due to 'not being bothered to learn how to set them up properly' surely.
Puts bike in car, bangs disc...rubbing or squeaky brakes because they've bent the disc or not refitted the wheel properly? User error because...
I've used hydraulic discs since 2004 and in all that time I have never had a leak or a seal go or a piston sieze or nicked my hose and lost my brakes, because like you, I can
be bothered to learn how to maintain my bike.
Whilst you're constantly telling everyone how cantis are the best if you take the time to set them up and maintain them, you're forgetting that disc brakes, given that same level of care and maintenance that you lavish on your cantis, outperform every other type of brake in every way.
fine if you've go the money to throw at them but a £2.99 cable usually sorts a duff set of canti/ v-brakes for us spend thrifts.
Sums it up, and relates nicely to my earlier point...
... myth that the luddites like to put about to justify not spending money