One other thing to note about open source and I was explaining this recently to my daughter who is planning to major in CS and become a software engineer. . .

One other thing to note about open source and I was explaining this recently to my daughter who is planning to major in CS and become a software engineer. . . If you create a popular open source tool/framework/etc and it really takes off, that's pretty much an amazing bullet point to add to your resume. In fact, some companies might proactively seek you for that. And you can sometimes turn that into a lucrative commercial software company too. . . a la Freemium model or by offering paid support/customizations. On my part, when I'm hiring, I don't count it against someone if they don't have open source contributions that I can use (because I also respect the right to NOT code every waking moment of your life) but if someone has built something I've heard of and even better, something that I use and value. . . that's a HUGE plus. One last note though, someone might create lots of amazing open source tools and also be an asshole and that's not something I want on my team. Some open source folks are exceptionally arrogant fwiw.