Yeah, selecting a stack IMO has more to do with scoping your goals.

For example, if you are an indie dev who will be developing a project solo, pick whatever you're best at, because all that matters is the product.

If you're an open source project, that's a different story. If you're looking to hire engineers, also a different game. And if you're the creator of Ruby on Rails and have created a giant personal brand around being contrarian and ignoring the new-hotness in web dev, then your choice is made for you.