If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
Random thought.
So, minor changes in designs of things sometimes result in better versions of things. You then build those things, and make minor design changes there. Repeat. Eventually you often get a version of a thing that no longer sees improvement from minor change.
"Global maximum!" declares a PhD biologist at a good university.
How common is this defect?
By the way, this video showing the laryngeal nerve of the giraffe is a fascinating example of the role of local optimum in evolution.