I only used a slider for a brief period, so I wouldn't really say I converted back to fixed pins.
What I realized about my 3 pins, is that I can set and shoot a lot quicker than my hunting partners. Our target shooting was aimed at being close to hunting situations. We would randomly pick a spot to shoot from, range, and shoot. While they were fiddling with their slider, I could usually have a shot off.
I set my three pins to 20, 40, 60, or 20,30,40 and just gap them for yardages between. Certainly not as accurate as a perfectly positioned slider, but not too much worse. I definitely would chose speed over precise accuracy when hunting.