If I have to pick only one it procedural low level programming, like good old C. Taught me a lot about how memory is laid out, how software works under the hoo

If I have to pick only one it procedural low level programming, like good old C. Taught me a lot about how memory is laid out, how software works under the hood, about lower level concepts. Going from C to higher level languages like C++, C#, JS or Python means that I have a glimpse into why things work the way they work and having that understanding is helpful.