SSG in all your various guises,
You do know that a number, increasing at that, of corporate engines are "on condition" including the CF-34 (CL-600 series), HT 7000 (CL 300), BR 710 (GLEX, GLF) to name a few. The HT 7000 is hugely derated. The BR 710 offers flex power take-offs thru the FMS.
Please stop extrapolating from one data point--the aging JT-15D. You are making the pros flying newer business planes look like an uneducated group of Neanderthals. Just saying'
GF