Originally Posted by sfrider

Yes, bicycles are designed to be simple to service for anyone with minimal DIY skills.

Cars and MCs on the other hand use paint-peeling DOT fluids, have ABS reservoirs and valves/pistons, multiple brake calipers, midpoint bleed nipples (because of routing), etc. They're significantly harder to work on and getting all their out on a fresh fill can be challenging. In addition, because of the fluids and materials, they tend to collect debris in the piston areas that should be removed (via the bleed valve). 20 years is WAY too long to not service car brakes.