TOML (Tom's Obvious, Minimal Language) was designed as a less surprising YAML. It uses INI-style sections, explicit string quoting, and native dates.
If you've edited a `Cargo.toml` (Rust), `pyproject.toml` (Python), or `wrangler.toml` (Cloudflare), you've used it.
Compared to YAML: stricter, no whitespace pitfalls, but less compact for deeply nested structures.