Plugin has advantages though, consider I don't need the built in pdf in browser, if the pdf reader was a third party plugin I could decide to not install or remove it, less code that I do not use is better. Also we could have a few prf reader plugins choices instead of having the one Google/Mozilla chose. Anyway the people wanting Flash to be preserved do not intend to built Flash apps but conserve the existing ones, most of them could be run in the standalone player(I think a few try to hook into the browser to get the url or similar ,so those would fail as standalone)