I was a mod for quite some time on a lawn care site. It was surprising the number of "pros" who were none the wiser.
Either the mower will mulch or just toss the grass depending on the baffle. Not including the blades. Different blades for different situations/seasons.
My residential and commercial get high lift gator blades. Unfortunately if it's even a bit damp, we'll have to blow clumps, or if there is time for it to dry a bit while cutting another section, then go back for a double cut (standard as we always cut in different directions, Everytime ) to reduce thatch build up.
Neighborhood Common ground, fields, empty lots all get a low lift blade so it will discharge as quickly as possible, reducing time spent on that account. Usually people who are looking for a cheap cut.
Exmark in particular doesn't have an adjustable baffle, as of '16, that I'm aware of. So they have bolt ons that force the grass to discharge much further than it would normally. Helping smooth the clippings in big fields etc.
I'm always learning something new from you so that short story is the least I could do