Part of Case study series:
About worldbuilding? I doubt it. It does not really build a world; it just uses real world as a background.
Risking off-topic? I think not. When writing the question, I tried to provide clear criteria for an acceptable answer to avoid opinion-based or idea-generation answers.
About Worldbuilding? Again, I think the answer is no. It uses a quickly drafted world as a background and asks about actions of a specific person in that world.
Risking off-topic? I think there is a close reason for actions of one person. I decided to ask the above question because I know that asking about "one average person and their actions" is generally considered on-topic here
About Worldbuilding? Here I rather incline towards yes; although, I am actually building a temple and not a world.
Risking off-topic? I would say no. I tried to avoid opinion-based answers by adding how much resources I have and how many years the temple needs to hold
About Worldbuilding? Yes, under the premise that a generational ship is a "world" in itself, although really tiny.
Risking off-topic? This could be an opinion-based question, although I tried to make the question as well defined as I could.
Additional info" This question was my "contest entry" to a biweekly tag challenge and it won the tag challenge.
About Worldbuilding? No, but it builds a society rather than a world.
Risking off-topic? To me this is borderline opinion-based. Also, it is rather an old question, to showcase what was generally accepted.
P.S.: I typed all of above with kid on my lap, so there will be typos and errors. If I find time, I will revisit this question and edit it on myself, but if you see an error, please feel free to correct it.