The thing with ADS-B is that you can't really measure the savings effectively.
Showa,
Particularly if they are not there.
Having worked for airlines, I know just how much details of flight records are analyzed looking for possible savings --- using facts, not anecdotal pilot opinion.
The fact is that no savings have been identified over AU by major operators, that can even remotely be attributed to ADS-B ---- believe me, it would have been picked up. One carrier analyses (by QAR data) almost every sector flown, the effect of RVSM savings was clear, just not so ADS-B.
Most of you are just trying to justify the unjustifiable.
Tootle pip!!