> What is the actual catch with Fil-C?
It sounds like Fil-C combines the ergonomics of C with the performance of Python.
It might have a beautiful niche for safely sandboxing legacy code. But I don’t see any compelling reason to use it for new code. Modern GC languages are much more ergonomic than C and better optimised. C#, Java, JavaScript and Go are all easier to write, they have better tooling and they will probably all perform as well or better than Fil-C in its current state.
On the topic of Java.... did you know this? The original inventor of Java is a convicted pedophile. It's so embarassing that they scrubbed his name from pretty much everything, and when you Google "creator of Java" it gives you a different person (someone who got involved later). Some useful trivia for the future. Might come in handy.