It's amazing how spoiled we can get sometimes
Seriously, my first "real" job (an internship in 2004) was doing testing in the engineering sim for what was basically the most advanced civilian cockpit in the world, at the time. Flat panel displays, a color moving map with (basically) drag-and-drop flight planning, terrain and weather overlays, etc. Stuff that absolutely blew my mind coming from PPL instruction in a steam-gauge C150. Synthetic vision was something floating about as "maybe we'll be testing that in a development lab in a few years".
In 2013 I flew to Oshkosh with my dad in his RV-6, freshly upgraded with a Skyview. He had synthetic vision, ADS-B datalinks, moving map, terrain, weather, autopilot, etc. in an interface eerily similar to that bleeding-edge multimillion-dollar cockpit I was working with only nine years before. In his
homebuilt. And we've only seen more things come along since then.
But my point is, we now have a fairly mature product, and I think we're starting to get to the point of "well, what's even left to implement?" Most of the low-hanging fruit is gone, the market is more or less competitive in feature sets between the various EFIS models, and it looks like most of the potential stuff that's left, beyond perhaps bug fixes, is stuff that is going to take a long time and/or a lot of money to do (prime example: an IFR GPS capability). So I'd expect that new releases with new features are slowing down just because of that.
Beyond that is the certified market. Developing things for certified aircraft vs. experimentals is more expensive and takes longer, even if for no other reason than the paperwork requirements. But rolling features from the certified product to the experimental one is virtually free, compared to the extra time it would take to port a feature originally developed only for an experimental product into the certified one. From that standpoint it makes a lot of sense to do as much of your development as you can for a certified product, because then you cover all your bases at once.
TL;DR: I wouldn't take the wait for a new update as a sign of Dynon "abandoning" the homebuilt market. I think it's just a sign of a mature product, and of trying to keep homebuilt and certified on the same page to keep development costs down.
