Really cool tribute to Flash games through the years. Nostalgic af scrolling through this, and a little sad realising that with progress maybe there has been something of value lost..
Definitely not meaning Flash as a technology there. More.. realising how many little flash animations and games have clearly still stuck with me. How mainstream it was for people to be playing these games, sharing funny animations, mostly all made by people for fun and not profit
On the other hand, Newgrounds still exists and there does seem to be a community there, which is really cool! Going to dive down that rabbit hole and see what I find..
Server run by the main developers of the project 
It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!
There are just about as accessible technologies these days, in the form of generally much better successors to Flash. So what's missing? The right platform?
I guess closest equivalent I can think of for sharing experimental little games would maybe be http://itch.io?