Not that many people using multi-footswitch pedals for hands free arranger control, though. Even if you have a PSR, with no multi-switch input, a MIDI set of pedals can easily be programmed to do all that.
It's hard to explain the musical freedom you get if you remove the need to periodically stop playing just to have to press buttons. Not to mention, a lot of the time you need to press them the is often the time that you need to be playing the most (turnarounds, breaks, etc.).
I wold be lost trying to play and do all the necessary button pushing. Playing has always been my #1 focus, and anything that gets in the way is removed, if at all possible!
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An arranger is just a tool. What matters is what you build with it..!