Nowadays there is so many who are gigging by use of arranger kb's who
don't need a single style anymore, because only using the midifiles or
sequensed songs as backing-tracks all the way, so when use a little of
this and a little of that I guess 20 styles will be enough?

20 styles for a evening gig seems to be a kind of short if you use only
the styles as accomp when play 4 - 5 hours, but I guess when we know
modern kb's have styles with two or more intros, endings and variations,
one style can easily be used at least for two songs, so then 20 styles
all that sudden cover 40 songs.

But then again, you're kind of stuck to play songs who fit to that styles,
rather than find a style suitable to the songs you want to play, and that
is a reason why I just don't have enought with 20, specially since I don't
play the bass manually by left hand as UD and many other does.

GJ