How often do you search the Linux filesystem case sensitively? I couldn't tell you how to use `find` to search case sensitively (use -iname to match a name case insensitively) and tab completion works case insensitively on my computer (maybe it's some configuration I picked up two decades ago? dunno).

In the gui it's always been case insensitive.

The fact that the linux filesystem allows you to have a file named "o'brien.txt" and another file called "O'Brien.txt" is a completely different matter than case insensitive filtering.

Otoh, at least they let you call the file "O'Brien.txt"... How many incompetent programmers suddenly decide that because an apostrophe is a part of SQL syntax, it's prohibited to include apostrophes in names? (or prohibit them when they aren't preceded by a backslash, which is just weird. the thinking behind that logic is unfathomable. it doesn't actually make a string safe to include in sql, simply because at some point in its lifetime, all apostrophes grew unwanted backslashes)

The filesystem is not a search facility. If you want a fuzzy search utility, get a fuzzy search utility. The filesystem itself should distinguish between letter cases, in case the user wants to.