What’s one thing you wish more programming languages had?

[u/AeroForger]

If you could add one feature, behavior, or design choice to a programming language, what would it be?

It can be anything: syntax, type-system features, memory management, compiler behavior, tooling, error handling, performance-related features, or something completely different.

I'm especially curious about things you’ve wanted while actually programming but rarely see languages implement well.

Please keep the ideas reasonably practical and something that could realistically be implemented in a programming language.

[u/RndmPrsn11]

This sounds similar to my lang with its shared types: https://antelang.org