I would disagree on the safety as far as the UK is concerned. GPS is assisting in VFR conditions. Provided you understand how to use your unit, you do not get much more out of any of them other than your position. I started with a Garmin 55AVD and now have a 196 which I have no intention of changing for many years. Most of the advance features on the 396 like weather info do not work in the uk, and I would probably integrate them into my home built glass panel rather than the Garmin option.
Microsoft stopped launching yet another new version of windows because the upgrade ratio dropped off to the point it became embarrassing.
Rod1