Jon Pretty

Are you aware of Dotty's syntactic sugar for enums?

Yep. It's a complete&utter trainwreck. Having made multiple enum impls over the years, I'd have died in shame proposing something like that.

Is the problem that they don't quite offer a complete replacement for sealed traits and case classes?

I think I found 6 or 7 design mistakes. Each significant enough to outright reject this proposal. But SIP process doesn't apply anyway.

Not to Dotty, it doesn't... but Martin did change the proposal in response to feedback on his PR, so it's not like it was a closed process.

I don't think any changes can fix it. It's not only what it does, but that the whole thing is a confused, sprawling, over-complicated mess.

But it brings much more accessible syntax to something many programmers would not bother to write because it would be too verbose.

Which of the multiple syntax variations? "enum class" isn't shorter and "enum" hardly supports any Scala language "feature", e.g. methods.