Newgrounds really was the golden age for web gaming. And, similar to early web, early mobile gaming also started out with nostalgia-worthy charm and heart. You're right that it's been hollowed out, but the same thing happened to web gaming after the Flash era. The social casino era is maybe its 6th reinvention, and its lowest yet.
Now that mobile gaming has been raced to the bottom and consolidated (and thanks to the dual tailwinds of AI making it easy to write code without engines and the web maturing in its 3d+networking capabilities) we're started to see a resurgence of web-based games - it's my full-time job now! Granted we still do rely on mobile apps (as web wrappers) for monetization, but that wall is crumbling rapidly.
The games were more polished by the time, but still quite wild.
internet is not the only thin that suffers it. TV, music, its the same. Listen to what kids played music ,movies, toys etc. in 60, 70, 80, 90s up to today. you will see very sharp changes, first in how they occupy themselves and then in how they shape society -_- for their kids to go into the next dumbing down cycle.
(yes v cynical and black n white put. easier to word)
Id wager (heh) that it's much more down to a lack of regulation combined with the normalisation of influencer driven get rich quick but pretend it's clever investing that exploded in popularity with crypto and wallstreetbets style influencer investing. Combine that with house prices being where they are and people get risky with investing as their hope outstrips their caution.
I don't think a few rounds of balatro or slotomania leads to that.
NG didn't have multiple 500MB downloads, buttons in the wrong place, pointless currencies. More importantly NG artists actually cared. I understand why Apple killed Flash, but what we got in its place is not better.
WebAssembly is better compilation target and runtime than Flash ever was. Many languages can compile to WebAssembly.
I think what you want is an authoring tool like Flash. Why not make that tool? Or if you don't want to make it, Rive's a pretty good animation engine. You can make games with it:
SWF is extremely compact, since it was intended to be used over a dialup connection. Flash worked because the player was preinstalled on the computer.
The newer Ruffle player is a 10MB download in addition to the actual flash file. You get a new freshly downloaded copy of Ruffle from every site that's hosting Flash content.
The internet has very much moved on.
A three minute, 1080p YouTube music video encoded in AV1 video with Opus audio is 30 megabytes. No one bats an eyelash at downloading that.
To prove it, this one has been downloaded 2.6 billion times: https://www.youtube.com/watch?v=ekr2nIex040
To even further prove it, this one has been downloaded 17 billion times: https://www.youtube.com/watch?v=XqZsoesa55w
In retrospect, it turns out the reasons were a load of bollocks. Modern web is 10 times more bloated than Flash ever was, and nobody cares.
Thank God we made the web so much safer!!
There's at least one industry that reaaaaally got fucked with the sunsetting of Flash: e learning