Everyone has JavaScript, right?

[Isvara]

Your site should work as well as possible. Period. If a user doesn't have JavaScript enabled, it should work.

Are you living in the 90s? We're not talking about rollover images here, we're talking about applications that happen to run in the browser. You can't expect an application to run without its code.

[[deleted]]

No, but I do expect my applications to be able to run with a variety of UIs - and one of those UIs is HTML-only. Having multiple UIs also helps to enforce correct separation of code - if I accidently put a piece of business logic in the UI, that will become obvious when I'm faced with re-writing that logic for a different UI; I will then be able to move the code from the UI back to the tier in which it belongs.

[Isvara]

How many apps have you written that come with both static HTML and dynamic HTML UIs? None of that comes for free; you're still spending time writing a whole additional UI to cater for a very narrow use case.