Times are certainly changing. Engines like the RS4's and the current e92 M3's are the last of its kind. We need to appreciate them while they are around.
I praise BMW and their hi-revving engines in mainstream motors because without them I doubt Audi would ever have took the approach of 'we'll show them' and build their 4.2FSI. But the reality is that in mainstream these engines are dinosaurs due to their inability to get the emissions down and their economy up.