> C code compiles fine after decades Early C code doesn't compile on modern systems at all. Speaking of early C code, every vendor had their own version. C st

> C code compiles fine after decades Early C code doesn't compile on modern systems at all. Speaking of early C code, every vendor had their own version. C standardization had to go a long way. Even today, writing portable C code is hard. Need a portable 128-bit integer? Good luck on Windows. Need a portable 32-bit integer? Better take a C implementation that provides int32_t, because just using "int" bites you when switching from 32-bit to 64-bit platforms. Oh, and int32_t was introduced in C99, which is not exactly "decades" ago, but admittedly that was 18 years ago. However, I wouldn't bet on portability of any code older than that, unless the authors of that C code were extremely careful and anticipatory. But then, with enough effort (and perhaps code generation), you can create portable code in any language. Rust skips all that mess, by having a clear experimental phase in the 0.x versions. It became stable with a clear commitment to backwards compatibility since 1.0, which was released in 2015.