> From the perspective of high level application development, I can't see a technical use case for a language other than Rust these days.
Win forms/WPF is essentially legacy, and using C# consumes much more resources than Rust (even for UI, see Windows Reactor C# vs Rust).
Additionally, I don't think C# is that simple anymore. By now it has so many features added and the list is still increasing this day. Rust is more difficult to get productive, but the actual language complexity isnt that big.
LLMS makes onboarding to Rust much easier though if you even still write code yourself. I don't think the productivity difference is that large.