I don't think so, lets try break it down an see.

If a style is typically made up of 8 parts, lets say then that 6 notes of poly would be used up on the drum, percussion and bass tracks. So that leaves 26 notes poly for just 5 ACC parts. That's quite a lot let to work with considering ACC parts will only be made up of notes picking at instruments and maybe one track producing full chords.

The only things to really watch out for are Piano tracks which are using the Damper pedal. Just one of those could use up all 32 notes.

All in all I think for style playback the SD2 has more than enough juice to do the job.

Come to think of it, I used to gig 7 night a week once upon a time with just a KORG Trinity sequenced up to it's eyes and that only had 32 notes of poly.

Regards
James