I wouldn't be surprised if programmers had, collectively, written more game engines than actual games.
Tailored to web developers, there definitively are more half-finished frameworks sitting on people's disks than finished web applications, I'm sure my ratio is pretty close to 1/1 over the years.
* I am not allowed to use a blogging system I wrote. (Really, I've written three or four at this point and need to stop, and there are plenty of existing systems that still align with my idiosyncratic constraints.)
* The blog must not have any meta content about blog tooling.
(I cheated a little on the latter by having an extra "site" blog for that - which lets me get the words out but doesn't "count" for the writing goal. A useful outlet, but it meant an extra month or so before "real writing" outnumbered meta writing :-)
For me, I can't learn anything unless I actually have a purpose for it. So if I wanted to learn how to write a static site system, I would also need to think of a reason I need one!
Those losers who still need Perl on their servers better be ready for a mind explosion
...thought, me back in (too lazy to look up which year it was). I probably published like two things with it, spent (what felt like) a million person hours on it, just to abandon it and use Textpattern.
(I admit, I am guilty).