[ofrzeta]

Same here. I got back to some problems I left open due to other obligations but finally quit. Plus there's the "problem" of the timezone: Puzzles start at 6am here. Last year I had some time off between jobs but this time it collides with my usual heading to the train. Unless I am really fast and am able to solve between 6:00 and 6:04 ;-)

Related is the tool of choice. I was and would probably still be using Python with the addition of Numpy which by studying other solutions found out to be quite efficient for the AoC type of combinatorics puzzles. Although I had the intention of learning it I didn't make it over the course of a year.

[xyzzy_plugh]

Agree with the timezone being problematic. I find the leaderboard to be a big turn-off/demotivator as I have no chance of making it there.