The website is a private undertaking which started literally a few days ago. It's not some official complete tracker.

The point was to show that big corps are dependent on Scala, often at their core.

Scala is likely not for everybody, but where you need to write safe high level code there is more or less no alternative, not even on the horizon. Scala is simply very likely where Rust will end up after the honeymoon, when people realize that feature rich, safety first languages aren't for the mass market, where mostly only the cost of initial development counts.

True, Scala (the language) offers lots of great functionality. And Scala 3 brought some important improvements.

But safety is not the only important aspect of a programming language. For me personally the community (libraries, tools, forums, blogs, etc) became much more important over the years, and I feel that Scala 3 really hurt the community angle.