Probably 90% of my time on the web is spent working with information - searching for it, reading it, manipulating it, submitting it. Sometimes I'm using Firefox

Probably 90% of my time on the web is spent working with information - searching for it, reading it, manipulating it, submitting it. Sometimes I'm using Firefox and reading and typing with my own eyes and fingers, sometimes I'm copy/pasting or even writing scripts to submit forms and screen-scrape. After all, that's the sort of thing the Web was designed for - free exchange of information (modulo HTTP's 402 error code). Flash sucks because it interferes with my usage of the web. Almost every use of Flash puts a barrier between me and the information I want to get or give, a barrier that can be very annoying (though never impossible) to overcome. About the only thing on the Web that isn't "information" is "experience" - I can't think of any example besides games, but there may be some. You know, where the valuable thing is the interaction, the ping and pong. That's not a thing I can paste into a spreadsheet, process with a script or bookmark. For such things, I can accept that the powerful Flash plugin is a better platform than the documents-and-tables world of HTML. Still, most Flash usage that I see on the web is just to add glitz and glamour to an otherwise informative page - swoopy page transitions, animations, sound-effects. To the extent that your website prevents your visitors from obtaining and making use of the information they came to your website to obtain, Flash sucks.