To fully utiltize the capability of its systems requires a lot of study and practice. It represents a significant amount of effort, however the payoff, particularly in the latest Garmin Perspective fit, is situational awareness and navigational accuracy that makes a mid 1990's Airbus cockpit look stone age.
And here in lies the problem. Too many GA pilots buy aeroplanes, or mis match their skill set (over ego), that they can not cope with.
Some, obviously, are prepared to stick in the effort, but I feel, perhaps a majority, think this is a 'piece of cake', I am told it is easy, therefore will work it as I go - disaster looms eventually