A different strategy is to make use of a variable displacement pump.  Once the pump is configured for minimal displacement, it provides a reduced quantity of oil move, leading to the hydraulic motor(s) to turn more slowly and gradually. Like most automotive technologies, there are advantages and drawbacks to CVT gearboxes https://gearbox-cvt39505.topbloghub.com/40511057/the-gearbox-cvt-diaries