>>1115930>Rim brakes do their job well enough (locking up front wheel when wet) on aluminium rims, so why change a working system?Modulation. A stick in the spokes can also lock up the wheel, or a foot jammed into the tyre, but neither would make a good braking system.
>Also rim brakes allow for fast dissasembling and reassembling of the bike when required while disc brakes need spacers and require you to position the wheel in the exact same position.Very few people disassemble their bikes on a regular basis, but even those that do don't have a problem with disc brakes. A lot of disc bikes use through axles where the wheel does go in the exact same position every time, however even with a quick release it's not hard to get it fully seated. I've never once had to move my caliper after removing and replacing a wheel (and doing so doesn't require spacers, just undo two bolts and line it up).
>>1115927If a hydraulic system fucks up in the middle of nowhere then you are shit out of luck (well, you still have another brake to get you by), however they are less likely to fuck up in the first place compared to cable brakes especially in adverse conditions (I'm assuming half decent brakes here, not the absolute cheapest hydros or a set of Avids with a known fault).
Also disc pads last longer than rim pads and take up less room than rim pads (if you're using a cartridge system it's probably about the same). If you're relying on being able to find spares instead of carrying them on you then you're doing it wrong.