[aaronblohowiak]

Physical construction envy is naive.

Many bridge-building projects go over time and over budget.

Most bridges have a feature list fixed years before construction is begun.

Bridges are static. Even draw-bridges do not adapt to their environment automatically, but require human intervention.

There is a categorical error when you try to apply construction practices of static things to the construction practices of dynamic things, hence the failure of waterfall. Note that the original papers that introduced waterfall actually suggest a system that more closely resembles iterative development than BUFD.

[regularfry]

If we found a way to make BDUF work reliably, it would transform the industry overnight, and turn software development into a recognisable engineering discipline. The fact that we haven't yet, and that one particular approach failed, doesn't mean that it isn't possible. Nor does it mean we should stop trying.

Iterative development is an interesting stop-gap, but it's certainly not the be-all and end-all we should be looking for.