I would say as many as nine out of ten companies don't run mulching mowers. I realize on large commercial properties the contracts are bid to death so getting done quickly is a must. Mulching can slow you down too much and hurt your profit margin. On crappy properties blowing the over grown stuff out the side is a must as well so you don't bog the mower and clog up the deck. But for those of us that won't set foot on a crappy property and do only nice irrigated properties mulching is the way to go. All an open chute does is end up blowing crap in the flower beds and increase your cleanup time. Or you waste time trying to mowing the entire yard so the chute faces away from the beds. Eventually you find yourself mowing a confined strip of grass where you have no choice but to do a drive by on the beds and hose them down with grass clippings. I don't care how good you are at blowing you can't get 100% of the grass out. Over time the buildup of grass in the beds gets worse and worse. Plus your wasting time trying to blow out a mess that didn't need to happen in the first place. The drawback of mulching is that tall grass is more of a challenge for the mowers. Tall grass can lead to Mohawks and a double cut occasionally. But 90% of the time the mulching mower will save you time on the blowing required. The other huge befit of mulching is that the grass is cut up to a fraction the size of a mowers that ejects the grass. The much smaller particles of grass decompose much quicker and the mower does a better job of forcing the clipping down to the soil level. Mulching mowers do a much better job of minimizing the buildup of clippings in the yard because the smaller clippings decompose more quickly. On St. Augustine properties keeping the decaying thatch level to a minimum is a must. Excess thatch can lead to an increased chance of having an issue with lawn fungus. The thatch can hold water and moisture on top of the soil where you don't want it to be.