Here is a video of a similar set up to mine.
But I can see why someone someone would become over reliant on the newer systems.
My attitude gyro and directional gyro are vacuum driven (no electricity) off of the engine while my Aspen is not only electric, it has it's own battery backup.
So I would have to have multiple malfunctions before I would be lost-in-space!
Oh, I have THREE GPS navigation systems. Dual Garmin 430s and the Aspen not only has a built in GPS but it is also battery backed up!