You're not just taking away C# support...

[recumbent]

Can I dotnet run single-file.fs (with consistent syntax to the C# single file apps) - no, no I can't

Can I therefore - per your suggestion - run F# in Jupyter with the appropriate kernel? Oh... wait, no you're deprecating the kernel I need for that too 😭

Yes there are alternatives - but that is not the point, there were alternatives for C# before and a single file is in no way comparable to the quality and diversity of stuff you delivered in a notebook.

I wouldn't mind so much, I understand commercial imperatives, but the dotnet == C# thing gets me every time 😖

[lextm]

You might want to subscribe to #4195. A lot of options are there on the table for users like you.