Honestly no real reason other than it's the one I know and didn't want to spend any more time on finding software to write with instead of spending the time on writing
Heh I can empathise. Two of my biggest reasons for wanting to move to a static site generator are actually to have actual control over the content (in markdown files, and because WordPress and its plugins do a fair bit of processing on the raw content), and because I'm more comfortable hacking in languages that aren't PHP.
That seems to have stopped me from writing though.
> more comfortable hacking in languages that aren't PHP
Oddly enough it was the opposite of that for me. Each of the static site generators I looked at were non-PHP (which is fine but I lack the experience)
I tell you what, if someone ever had a gun to my head and said "make this Ruby software work first time without errors" they might as well just pull the trigger
That seems to have stopped me from writing though.