Most, if not all, of the accordion players I sold a Tyros/PSR to, were totally satisfied having 61 keys.

Plenty of room for melody.

The synth players were the same.

Piano players wanted more, but grumbled about semi-weighted keys feeling unnatural for piano pieces.

I guess, for the latter, it is a compromise no matter how you look at it...just what kind of compromise would be best.

Ian