I'm really interested in hearing why there's a need for 76 or 88 keys, and the songs that make the need for them so necessary.
I originally studied piano and for the most of the last 30 years always used 88 keys because I strictly played piano. A couple of years ago I started with low end Yamaha arranger for fun. One thing lead to another and I started taking an arranger on gigs. I guess for me it's my security blanket in the remote case that someone asks me to play a ragtime or classical piece of music.