That's not entirely correct, given that most software projects tend to deliver new versions of something that already exists. Maintenance releases generally ten

That's not entirely correct, given that most software projects tend to deliver new versions of something that already exists. Maintenance releases generally tend to be successful. It's new projects that are hard and often have disastrous failures or cost overruns. I don't think software is unique in that regard. The Berlin Brandenburg Airport [1] and the new SF Bay Bridge [2] are cases in point. The latter included serious concerns about the integrity of the bolts that secure the East end of the suspension cables to its pier. [1] https://en.wikipedia.org/wiki/Berlin_Brandenburg_Airport#Overview https://en.wikipedia.org/wiki/Berlin_Brandenburg_Airport#Ove... [2] https://www.wnyc.org/story/316201-brief-history-64-billion-bay-bridge/ https://www.wnyc.org/story/316201-brief-history-64-billion-b...