for me, like you I guess, the fact the Jam started at 9pm and not 9am. This is for me 12h wasted, as I have a full-time day job also. My idea was to finish something at Monday evening, so I could spend the rest of the week doing art-music for my game because these are things I can do in chunks of 1-2 hours. Coding is something I need to focus on, so I prefer to do this in some long runs otherwise I spend to much time figuring out where I left off the day before.