Both my bikes have hydraulic brakes, kind of. The fancy road bike has a factory SRAM set.
My commuting bike has a front hydraulic disc brake, and a rear cantilever brake. It's an old 1990 Ridgeback hybrid, so came with Cantilever brakes as stock. It also has a threaded headset...
Nethertheless, I had some cable disc brakes lying around from upgrading a previous bike to hydros, and the wheel needed replacing anyway, so I got a disc brake wheel and a new fork, some unbranded steel one off ebay, but it had disc mounts and a threaded steerer. So I plopped on the cable brakes.
A bit later, I upgraded that brake to a hydro. It's only the front brake that really benefits anyway!