[pyre]

> But that project is actually shipping code that works

I get that this is more than just vaporware, but getting past the vaporware stage doesn't necessarily prove that something isn't too ambitious. When something is attempting to enact a paradigm shift, the final goal is adoption/usage, not just a working/functional product.

[gojomo]

You seem to be using "too ambitious" as a synonym for "unlikely to succeed". But that's something different.

"Too ambitious" implies someone shouldn't even be trying for this goal. That's a corrosive attitude, and I'd like it kept-in-check by a requirement that sources of such negativity show their reasoning/experience/work.

[urbit]

+1 - I can't emphasize this too strongly.