The tweet mentions that you could 'just' send an SWF file to someone and it played. Well, if anybody had to fix a computer, or hosted anything Flash-based during that era, then they would know that's bullshit. Sure maybe with the standalone Flash player it worked allright, but that's not how people really used Flash. Even in my experience, a single SWF running locally didn't always work across all versions of Flash p…
I suppose the point may be that no one has written a tool to package a HTML5 app up like that? Seems possible to build under certain constraints.