Originally Posted by
elcruxio
My cables simply do not survive multiple years. Perhaps it's the road salt or whatever but after two years they start getting sticky and sucky.
Anyways I'd imagine most hydraulic brakes these days use mineral oil instead of DOT fluid. Since it's hydrophobic you don't have to change it all that often. We have a bike that hasn't been bled in a decade. No ill effects so far. But just because you can leave something for that long doesn't mean you should.
It all depends for me. These have lasted a long time. Replacing every two years as a rule is simply ridiculous though, whereas replacing hygroscopic fluid is more important since the moisture in the fluid will cause issues with the brake internals. You are correct, mineral oil is nice, and is not hygroscopic.