Surprising no one who's ever had to work with it for longer than sixty seconds.
drwho
What have we learned? Much.
The real question is, what's changed because of it and how?
That's DHS.
NSA? Yes. CIA? Probably not. They don't have that kind of imagination. c.f., the internal parody of The Hunt for Red October they declassified about a decade ago.
Keep a sensor net on how the Linux subsystem in Windows evolves in the next couple of years.
Enough that it might crush the network for a while.
As BBSes go (because that's how the WELL started), 2700 active users is "holy shit" levels of success. That it's still online nearly 40 years later is unheard of.
And/or, private equity is revving up the bulldozers to strip mine each and every last bit of value out of it before they let it collapse.
I got to try messing around with a Hololens a couple of years back. The hand tracking wasn't perfect but it was pretty cool. It read my "typing in the air" gestures to set a WPA2 key very accurately (much to my surprise). The parameters of the demo I was playing around in (picking up and moving virtual packages around in a model city to control drones flying around that part of the convention center) was pretty cool.
Several such solutions already exist. Problem is, only folks like us mess around with it. Non-geeks, not so much.
Google happened to it. Right when some of us started doing practical things with it. Still haven't forgiven them for that.
Not having them pretty much makes Debian a non-starter for many home users. It's a thing that one really only runs into when they get serious about using Linux.