After a lesson from a pro that has worked with Steve Stricker. Even understand why and how Steve developed and uses the S grind.

Not sure exactly when but yes, I find it so important that I have a set of both high bounce and low bounce that I switch out depending on where I play. Not just about the sand I. The bunkers but also the type of grass and course conditions.

There are a few criteria that I need the wedges to suit. My primary sand wedge must suit the bunkers at the course(s) I play most frequently. If possible, it should also allow me to hit some different shots around the green and full swing shots. Most bunkers are medium heavy sand although I have played courses with rebuilt bunkers (soft sand until it settles in). Preferred wedge is the 54* M grind, but I also have an older 54* D grind for the soft sand conditions. When it is wetter, I also prefer the D grind around the greens, but when it is drier, the M grind becomes more preferred.

With respect to the 60*, I always want to feel I can get the face under the ball, so my preferred grind here is also the M grind. In an ideal world, my bag would have a medium bounce pitching wedge (48* F grind), the higher bounce sand wedge (54* M or D), and a lower bounce lob wedge (60* M grind) that allows me to hit some different shots around the greens.

Once I decided to take golf a little more serious than playing a few times a year. I started taking lessons and the pro started me on working on my wedge game only one winter. Those 4 months of nothing but wedges and putting opened my eyes to how important the right wedges were.
I went and got a wedge fitting, that was amazing. The fitter was very good and taught me about bounce and grinds. He had me hit several shots with my clubs. then he started handing me different wedges and would not let me see the lofts or grinds. I used several different clubs hitting various shots, after about 40 minutes he narrowed me down to 3 wedges. I then used those three clubs and played a handful of different shots to confirm those were the ones for me.