I would not call that unrealistic. A few comments: (1) Only on HN would anyone dream of referring to your list as "everything". You are actually targeting a ve

I would not call that unrealistic. A few comments: (1) Only on HN would anyone dream of referring to your list as "everything". You are actually targeting a very narrow, focused skill set: those required for a small(-ish) software or software-intensive business. Like it or not, you're proposing becoming a specialist (albeit with a somewhat broader specialty than a typical job description would call for). (2) In the real world, "everything" includes many, many other things. To get good at all that stuff on your list, you'll need to leave other skills by the wayside. The comment by taprun mentions chess, running, and cooking. You won't be getting better at any of those. (3) The I-do-everything approach sets a hard limit on the size of a business. An important reason for hiring & delegating is so that a business can grow.