Why are URLs case-sensitive?
My question: When URLs were first designed, why was case-sensitivity made a feature? I ask this because it seems to me (i.e., a layperson) that case-insensitivity would be preferred to prevent needless errors and simplify an already complicated string of text.
Also, is there a real purpose/advantage to having a case-sensitive URL (as opposed to the vast majority of URLs that point to the same page no matter the capitalization)?
Wikipedia, for example, is a website that is sensitive to letter case (except for the first character):