When the grass is too long to mulch, it's often so long that it would create a large volume of bagged clippings. In some areas, disposing of a large amount of grass clippings is a lot of trouble (i.e., the local municipality requires clippings to be in brown paper yard bags in order to be collected at the curb). In a situation like this, side discharging is a better option than bagging.

Hope this helps.

Some people don't really care what their lawn looks like they just care that it's cut so that's why we use the side discharge shoot.

LBs are 4 in 1....side bag, rear bag, mulch, and side discharge.

The long grass clip tends to smother the grass since they take a very long time to decompose. My lawn is suffering now for this reason. I have to alternate between mulch and bag each time I mow. That's why I never find side discharge useful since the grass clip has to be manually pick up and discharged anyway.