There will always be nay sayers for any change. I remember when they went from cast iron block to aluminum block there were many expert naysayers. Now we have compressed carbon, Oh No!
I remember being told years ago that aluminum was a scarce metal and should not be wasted on things like car wheels. Folks come up with the dumbest ideas as to why progress should not take place. Those folks should go back to wooden wagon axle bearings and oxen. That worked for hundreds of years and make cross country trips, east coast to west.