Comment by zelphirkalt

It seems like bad engineering culture though. If it was well engineered, then there would be simple concepts as a basis, upon which the product builds higher level, more complex things, that those targeted users think they need. Then there would be one API that is for the simple concepts, that lets people simply have tasks and get things done, potentially building a simpler UI on top of that API. The product itself could have a simple mode or higher level concepts mode.

If you read other people's comments here though, this is not what Jira APIs look like. Instead you have cruft built upon cruft, ever increasing in complexity, and seemingly no engineer was allowed to look back and fix things, find good concepts to represent things on a lower level. Lets build more features, accumulating more cruft on top, instead of fixing a broken design.