This is interesting - what are the typical use cases where you need to write more than 2-4 letters (e.g. "FBI" or "NASA" or something like that) in all caps ? It seems like quite unusual domain of writing - is it legal documents or something like that?
The hardware registers in our designs are all defined and used in upper case.
The file names in our code base have a lot of upper case in them as well.
But the real reason is tbat I learned speed typing in high school on an IBM Selectrix typewriter. I use CAPS LOCK even for FBI and NASA. It comes totally natural to me.
