> It's not your fault if nobody cared to mention that the user should be able to arbitrarily subdivide the pizza and select options sepatately for each subdivision - that's a feature update and it's OK if the original program hadn't though of that.

I would argue it’s part of your job most of the time to challenge whatever needs are presented and ask questions about the long-term vision to find a good middle ground of future proofing vs over-engineering. That is of course one of the hardest things to get right.