It's a great concept but the ecosystem, tooling, and stewardship are really crap.
It's sad that the only company using it in production switched to using Rust.
The only company "publicly" using it. I know Sean has mentioned there's a lot of fintech (i think) using it, just not blogging about it.
I didn't say that but it isn't far from what I said. I said that we have from time to time seen that indications of non public use but there is nothing I can point to.
TO be clear…
The switched because they changed their business focus from one of their products to another.
I'm sure we'd all agree that the best language to use is the language the best fits your problem domain.
Rust was a better fit for that new product than pony. That's not a reflection on the language.