I certainly believe people can be extremely productive for, say, 100h/w. For example, see Elon Musk for a straightforward counterexample to the "40h/w is peak absolute productivity on a sustained basis"-crowd. But it is useful to separate effective coding time from other productive, and not so productive, time. Empirically speaking, as evidenced by the thread and its sampling of highly motivated YC founders, few people average more than something like 4 hours of effective coding a day.

EDIT: I mean what I say in the first paragraph quite literally. Run Rescuetime for two weeks. See what it reports for Software Dev. That is close enough for effective coding time. It isn't rocket science. Self-reported numbers are almost without fail vastly overestimated, even for expert practitioners.

It's cool you're spending your time producing, but don't forget you need to take care of yourself and hone your fundamentals (linear algebra, data structures, algorithms, your field).