This includes architecture decisions, platform choices or any situation where a such a bad choice led to negative consequences.
To quote Arthur C. Clarke: Any sufficiently advanced technology is indistinguishable from magic. Used to be I looked on technology with wonder and amazement. I wanted to take it apart, ...
This question is a result of the question Which programming language do you really hate? where, unsurprisingly, all of the most popular languages are listed. Most of the top 15 are extremely common ...