One reason I haven't been writing...is that I've been writing. About seven years ago I visited Venice and first heard the story of St. Mark's body coming to Venice from Alexandria in 827. I was amazed that the details of this audacious body-snatch were lost to history. I resolved to write a book of historical fiction, filling in all the details. Then my wife and I had two kids.
Two years ago I started research for the book. Last year I began writing in earnest. A few months ago I finished the first complete draft: 99,000 words. Since then I've been doing very detailed red-line edits... making notes for fact-checks and improving the text.
And that's why I haven't been writing- been doing loads and loads of edits the old way, with a pen, so my writing time has not been at a computer.