Java or Python (or occasionally C#). Why do I need a 'stack' for a personal project ? Also, a weekend-or-two to set-up ?!? If it takes longer than 30 minutes t

Java or Python (or occasionally C#). Why do I need a 'stack' for a personal project ? Also, a weekend-or-two to set-up ?!? If it takes longer than 30 minutes to get going, it's not going to happen.