The most interesting software driven upgrades keep coming on my iPad and not in the panel, frankly.
The little addition to ForeFlight that pops up the ATIS frequency when a certain distance out from the landing airport for example, is an incredibly useful little thing, that would take years for someone to get through FAA's certification process in a device in the panel, and was just another freebie thrown in by the ForeFlight folks.
Same thing with the talking "entering runway" alerts. There's certified versions of that, but not as cleanly implemented as the FF one. And definitely not as cheap.
Panel avionics are stuck in the 90s. Even the experimental stuff. There's absolutely no reason an autopilot should cost $20,000 in the age of people building large autonomous robots in their kitchens for fun.
Yeah, yeah, "safety" and all that rot. I know. Problem is, the tech and the speed at which it can be delivered AND updated if there's a problem, far outpaces the certification process' speed by many orders of magnitude.