I don't like Java, I love Zig and Rust, and neither of those feelings matter when network latency is 10,000x bigger than your FFI overhead. A case study in not rewriting things.

The two places your data lives, how they differ, and the use-after-free bug that taught me why it matters.

How I learned that Zig's HashMap stores pointers, not data, and why that creates use-after-free bugs if you're not careful.

The two string types in Rust, when to use each, and why the distinction actually matters for memory management.