One time when I met a Titleist Ambassador on tour he commented how he updates his wedges a few times a year especially as the grooves wear down and before majors. Despite not being on tour (bummer! LOL), but as a result, I update my wedges 2-3 times a year and it does make a difference to a chronic range rat like myself.
Just received my Hand Ground set up for the winter...can't wait to get them in play!