VNAV
Just a few observations from a commercial pilot with many hours in the 777 and 737:
-There are similarities with the Lion Air crash and the SFO disaster. I think both accidents could have avoided with proper use of the VNAV (they are virtually identical on the 777 and 737).
-I've seen 777 and 737 crews screw up non-precision approaches because they never practice them. Remember the Guam accident? Have we learned nothing?
-VNAV (even on a base turn to a visual approach) is a great tool for a constant rate descent.
-At my airline, you are required to use all navigation aids, even in VFR conditions. Why would not you use VNAV as an aid for a stabilized approach?