wrote:
The more I hear of this type stuff, including similar problems in "high
end" biz jets, it seems only Boeing and Airbus have really gotten it right
for advanced displays and nav systems.

Hmmm... you have never seen the video of the Airbus A320 flying through
the trees prior to crashing at the Paris Airshow several years ago, have
you. So much for advanced electronic nav and display systems!