If 1) is true people might still not use it unless open source. Unthinkable in the 90s, now all companies (big and small) I work with demand open source languages and frameworks, besides for embedded work.
No single evaluation covers all users. We can see that the demand for software development is high and is especially high for backend. Anything that offers a safe, easy way to develop/deploy backends is a plus whether opensource or proprietary. Don't lock yourself into not getting locked as it goes.
Obviously, no one is going to leave something that's good for something that's slightly better with a ton of downsides.
So either: 1) Dark is a lot better, like way way way better than what's come before, or 2) it's not, and no-one will use Dark.
We can probably agree that one of these two are true, right?