@david_chisnall @futurebird when I was a teenager I developed my first Doom source port and it was how I truly learned to program in C. Having an existing codebase of good code to work within is a godsend because you are constantly being subconsciously taught what "good code" looks like. Plus yes, everything you've said here too: most of the work involved in programming is about changing code and not just writing it. Learning to debug, read code and reason about it are all essential