Most experts would agree, that the lower the RPM, the lower the wear on the engine
That may be true but I have never seen any data on it.
That's the most frustrating thing about all these engine management techniques -- no real data, no scientific evidence and (self declared) experts promoting very different things. Someone manages to run his engine 1000h post TBO and attributes it all to his superior skills. Coincidence becomes causality.
All one can do is gather all information out there and try to form an opinion. Although I don't like the fact that one has to have an opinion on things that appear to be fully determined by the laws of physics
I personally like what
John Deakin has to say.
Mike Busch's attitude I like as well.
PS: The automobile industry has also shifted to lower RPM / higher MP. Gearboxes with 8 gears, everything turbocharged, etc. Lower RPM = lower friction = higher efficiency. Not sure that engine reliability / longevity has improved though.