Well, I agree that 99% of your audience probably can't tell the difference, but as you've probably seen, the few who can, and most jazz players (yourself included) tend to have a very high standard for realism in this most purist of styles.

And if you are playing with too busy bassists, or too loud or bad timing, well, all I can say is - they aren't THAT scary, then!

Yes, the G1000 was the last Roland to include the Chord sequencer, and having played one for 9 yrs, I can assure you that, while you might miss some of the newer sounds and features, the ability to solo on your horn over a just played set of changes (no having to set everything up in advance) is worth every trade off versus a modern arranger.

I still find it amazing that the chord sequencer isn't as universal on all arrangers as the fill buttons or the SMF player........