In my case, I always seemed stuck back at the same mindset and mental "data structure" in my head, so it would be difficult to push it aside to make room for something new.
It might sound stupid, but it could also be the fear that I would lose said structure, and the next day would go entirely into rebuilding it.
My point was even when you find that job, burnout is a thing and diversity between your work and personal projects seems to make pursuing your interests a sustainable process.
We work in an industry where we have the luxury of skinning cats in 1000s of ways, so get out of your comfort zone and sharpen your knife, it's quite enjoyable and rewarding.
After ten years, you start wanting something different from work. Nothing wrong with that, you just need to find somewhere that will keep you intellectually fed.
Maybe I'm just in a better mood now, or maybe it's some sort of "productivity momentum". It used to be that when I got home from work, the thought of looking at a computer screen made me feel sick. Now it's fine. It's not that I rush home and code every night (I still take the time to unwind and relax), but I actually feel like I can go home and code now whereas I just couldn't bring myself to do it before.
I'm fortunate enough to work in such a job, but keep in mind that it's those "holy crap I didn't know you could do it that way" moments that get you excited and can't wait to tinker with in on your own.
There's a difference between being a bored conveyor belt developer who feels unfulfilled at the end of the day and someone whose been given a new set of "lego" and cannot contain their curiosity.