As a trained classical pianist I sometimes hanker after hammer-action weighted keyboards, but only when trying to play classical piano. The rest of the time the (notoriously) squelchy PSR2k keys do the job adequately well.

Also IMHO a well sorted hammer action is usually the fastest(!) because you use the keyboards natural rebound action in your favour. Try playing a fast trill on a crud keyboard then do it on something classy. No contest!