Over budget and late is the norm for projects that complicated. If you’re spending enormous sums of money on something that isn’t very, very close to something you know how to do, again you’ve actually done something very similar, and recently, massive cost overruns are the norm[1].

If the average software project is over budget, late and doesn’t do all the things it was supposed to do on design stage, just think how much more complex these things are.

[1]https://arxiv.org/pdf/1409.0003.pdf