[strictlypersonl]

As things get more and more crowded in the engine compartment, the advantage of hydraulics becomes more apparent. Cables require large radii to operate smoothly and that's sometimes not practical.

In addition, some systems of hydraulics operate at zero-clearance, allowing the whole mechanism to use higher mechanical advantage because there's no slack to be taken up anywhere. Cables may have an automatic adjustment mechanism, but it's a stepped take-up, not continuous.