Require Javascript on site?

[HiddenKnowledge]

Well, the conclusion of all this must be something along these lines:
It's generally recommended to use unobtrussive javascript if you want to make use of it, unless of course you want to make use of more advanced interactive stuff, such as animations, videos, et cetera.
Flash is only recommended when HTML5/Javascript doesn't provide what you need, and Silverlight is out of the question

So, that's about it?

Simply: Yes.