If you want, vote for this to be news in Wikipedia's frontpage! Here. Sign your vote at the end with "~~~~" and do it right as they are picky. If people don't vote in favor, it won't be in the news... If that's good or not it's hard to say, though.
I wish .swf was just like .jpg, .png, .mp3... Then it could be all over the web just fine. I don't understand it, this whole plug-ins deal... You don't need a plug-in to play an MP3 on any modern browser.
Many downloaded SWFs only work with an internet connection or don't work at all. Due to being site locked or something. I don't understand it much, but it's their demise. For example, the game DJManiax, after downloaded, only works if there's an internet connection, even though it's a local file. Why? With Flash unsupported, websites will most likely delete their Flash content. So will the downloaded SWFs stop working as they won't have the server to connect to? This is a big issue. Nonoba went offline some time ago and all Nonoba Flash games stopped being accessible, even the authors said they couldn't get to them. It's not about having a Flash player, that's the easiest part. It's about websites still having their servers and content up and how authors stopped SWFs from working off specific connections and domains. Newgrounds also doesn't help by not providing a Download button for Flash content (unlike in the Audio Portal).
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Now just recalling stuff not really from Newgrounds if you excuse me and the long post...
There are many websites that will shut down because people just doomed this rich content. There's a lot of content and Flash games not on Newgrounds that won't be saved the way they could be on Newgrounds. (By the way, do you know any of these next ones?)
For example, there won't be official online Tetris anymore at tetrisfriends.com (has multiplayer arena) -- it doesn't receive updates. As someone mentioned very well, Platform Racing 2's popularity is overwhelming. It's not just a game, because of its level editor, it's a world of games and a community inside (they invented over 100 different types of levels for what was just a racing levels game...). The many games that were never uploaded here... Like Bible Fight by AdultSwim (the bastards put it on Kongregate, though). Robin Allen's popular Hapland point and click game series too...
Then there are those somewhat fancy games that companies randomly made... Like M&M's classic game 50 Dark Movies Hidden in Painting. Or Coconut Run, Open House and even the Disney Flash games too... Another classic, the Java (not JavaScript) Hell of Sand Falling Game wasn't even fully converted to Flash and is already lost again.
It's a world of content that is doomed and irreplaceable.