jmmoric, not denying overload is a concern; priorities must be considered by value. Need to know vs nice to know, but do we know.
If LNAV is not approved, then why use it to monitor the approved navigation system.
We choose to display weather radar; decisions based on that system would be more strategic - delay the approach.
Whereas EGPWS display is more tactical, potential to detect inadvertent changes to plan, position, altitude. Why wait for (depend on) the EGPWS alert / warning.
ADF, compass, stopwatch, map (procedure / terrain), altimeter, airspeed …