I'd say it's mostly about your audience. Most people have flash installed and don't even know when they hit a flash page. For them, it's probably not a proble

I'd say it's mostly about your audience. Most people have flash installed and don't even know when they hit a flash page. For them, it's probably not a problem. If you want people to be able to view your app with a phone or from a non-MS OS (flash for Linux and OSX is still really bad), then plain HTML/JS might be the way to go. I personally don't have flash installed anywhere but on a win7 VM that I rdesktop into when I really want to see something that's trapped by flash. That doesn't happen too often, so most flash pages are lost to me. I'm pretty sure I'm in a tiny minority though, and for the most part people really don't seem to mind flash apps.