But there’s still the problem. If you established you career doing X and you’re preferred niche is Y, you aren’t going to get to use Y at work because it’s simp

But there’s still the problem. If you established you career doing X and you’re preferred niche is Y, you aren’t going to get to use Y at work because it’s simply irrelevant to you’re career doing X. Let’s say in a run of the mill enterprise web developer, but I have an interest in a particular niche, say low level network programming or game development. I can hone my skills in the latter all I want, but I’ll never get the chance use them at my day job and I’ll never get a job working in that nice because they’re only interested in already established professional experts.