I think the site is good overall, but I also found this particular language to be annoying.

It feels more like Apple(-esque) marketing than anything.

That also doesn't seem to match reality. Extraordinary claims require extraordinary evidence, and in this case I just don't see the evidence. Which is not surprising since it's a lie, at least for the "only language" part (the fact that Swift actually scales in this way is up to debate imo)

There are at least to issues on github about it right now. I filled one of them.

This language did stick out to me even though I prefer Swift over Rust.