If you work for others as a programmer, then likely they will want you to have spent the last five years using the tools they are using. If have your own busin

If you work for others as a programmer, then likely they will want you to have spent the last five years using the tools they are using. If have your own business and write your own code, then you get to pick what you want to learn and use and stay with just that. And maybe you already know enough. E.g., if some parts of Microsoft's .NET are enough for what you need to code and you know it, then why rush off to Linux? E.g., for my startup, I typed in 100,000 lines of typing with 24,000 statements in Visual Basic .NET; it all runs. And I know a lot more in computing but is not popular now. From just what I know, I can't be hired as a programmer, but I have no trouble programming for my startup.