And the "upper case" vs. "lower case" distinction, even though we no longer use a printing press in which each letter is sorted into a different box, or "case", depending on if it's a capital or not.

And we kept the letter "c", even though in English this is always* either pronounced like "k" or like "s", or the "ch" digraph. But sutsh ðings go in sykles, and one day ðe English language will be simplified.

* Saying "always" is a risk on a forum like this, no doubt there's an example I've not thought of.