[riizade]

I don't have anything insightful to add, I just want to add my voice to the choir of people saying that after using sum types, working in a language without them feels unnecessarily restrictive and awkward.

If this feature were implemented, it would take C# to a top contender for a daily driver language for me, and would make me feel a lot more confident in choosing it for projects where the C# ecosystem is already present, such Godot's C# version.

I'm really excited about this proposal, and I don't know anything about C#'s development pace, but I'll be watching from the sidelines hoping I can use union types in production in 2025 or so.