Originally Posted by Maelochs

HyRd brakes also use a mechanical/hydro hybrid as did Giant with its proprietary Conduct brake system---the difference being the Hy/Rd worked really well and Giant's system maybe not so much.

(https://trpcycling.com/product/hy-rd/) "Using an open hydraulic system it’s compatible with Shimano and SRAM 11 speed road shift levers. For compatibility questions contact us to ensure this caliper will work with your existing levers."

(https://www.giant-bicycles.com/global/showcase/conduct) "The key to the Conduct hydraulic brake system is its cable-actuated master cylinder. This unique design is integrated into the faceplate of the stem. It's a clean setup that combines the simplicity of mechanical disc brakes with the power and smooth feel of hydraulic. It's easy to install, too. There's no need to replace your mechanical brake lever or handlebar tape - simply shorten your current cable housing, then mount the new master cylinder on your Giant Contact SL or Contact stem."

Maybe Giant had a contract for a lot of Shimano mech STI levers but wanted to sell disc bikes? Still I wouldn't put Giant down for just that one choice.

At least with its prior (bike-shop level) offerings, Giant usually offered about the same level of features for a little less money than Trek/Spec/C'dale ... IMO.