I may be misremembering, but my recollection is that Dart was written off in large part because of Google. Distrust with them was already high as they were abusing their dominance with things like AMP, and people felt it was a bad idea to give them even more control over the web.

It also required Dartium, its Chrome based VM, and Chrome team eventually did not want to ship it any longer.

Yeah, but Lars Bak isn't exactly a nobody when it comes to computer science either. Although I guess Bak is more famous for the implementation of programming languages than their design.

Aside: funny how Dart and TS both have Danish creators.

https://en.wikipedia.org/wiki/Anders_Hejlsberg

https://en.wikipedia.org/wiki/Lars_Bak_(computer_programmer)

Google politics, Dart is only around thanks to AdWords team, and Flutter.

Jetpack Compose was created by Android team exactly as counter reaction to Flutter.

Go got lucky with their internal advocacy, and the push to rewrite Kubernetes from Java into Go.

Google isn't exactly known for great programming language design, contrary to runtime implementations.

TypeScript is however a plain JavaScript linter, you remove the type annotations and have JavaScript, which was a consequence of the learnings versus other JavaScript wannabe replacements.

Also why after namespaces and enums, the team never introduced any other feature that wasn't also part of JavaScript standardisation process, and has since then discouraged their use.