IMO, the above example is a very good reason to have TCAS in a single pilot, high performance turboprop aeroplane.
Why just high performance turboprops? Are you suggesting that the four people in the RFDS PC12 are more worthy of living than the four people in my V35B? I pop out of the clouds at 160 IAS - would not be much difference in the see-and-be-seen reaction time.
Bring on ADSB!
Dr 