I think two weekends/one week is about the ideal length; there's always a risk of feature creep but it strikes a good balance. Keep in mind a week, or even a weekend, is different for a NEET, a student, and a salary worker. Two weekends is about the shortest jam I'd consider doing in my current position. I've done some 1- and 2-month jams and the risk of feature creep is much more pronounced on those. Magical Girl Game Jam 2 was 2 months long and my initial game idea for that was so horrendously overscoped that I ended up scrapping and salvaging it into something completely different.
Why does ITALauncher exist at all? It's 100% because ITALauncher sounds more like a real training executable. Could I have renamed the other exe? Yes. Did I think of that at 11PM a day before launch? No, no I did not.