You are right about instrumentals once being very popular. What about Double Cookin, must have launched a thousand 'soulies'.
At the same time FLASHER, FALBALA, READY FOR THIS, STRUT IN TIME, OVERTURE, SIDRAS THEME, TOUGH GIRL, FIGHT THE POWER, INTERPLAY, LADY LADY LADY, BOOGIE WITH YOUR BABY, MAINTAIN, GALLOP, ALL TURNED ON, etc etc.
Most (not all) of the instrumentals are fast, and maybe too much for todays dance floor, where stuff like 'Its an uphill climb to the bottom, or 'some things are better left unsaid' fit the bill.
By the way, THE TRIP is a fantastic tune and great to DRIVE to as are all the old fast tunes I cant keep up with on a dancefloor any more.
Ed