In 18 months at NJE on the 7, I only flew 180 hours. with a 6 on 5 off roster that equtes to only 240 hours per airframe per year.
Therefore not high utilisation at all. At that time there only 3 of them on the fleet which makes it a bit of an oddity in the big plan. I think that's why they got rid of them when the Excel came along.
I actually quite liked the 7, it was the prats in Lisbon who were the problem.