It's largely practical; I like being able to discuss what I've done with people, including specifics. I make exceptions, but the amount of work that goes into

It's largely practical; I like being able to discuss what I've done with people, including specifics. I make exceptions, but the amount of work that goes into writing a compiler is probably worth more than a certificate is to me. A compiler project would definitely produce things I'd want to discuss with folks and code I'd want to reuse in later projects. One benefit I find of releasing something as FOSS (when permitted to do so) is that I know I'll be able to reuse it later[]. [] (this bit of reasoning deserves more explanation than I've given...)