Yeah, case-sensitivity in programming languages is a sad artifact of the past, I believe (just my opinion).
There were research studies showing that folks made less errors with case-insensitivity, and it's something that would help novices without hurting "experts" at all (in fact, save time). Even Guido van Rossom thought it might be a good idea to make Python case-insensitive apparently, but folks revolted (NIMPY - not in my python!): https://mail.python.org/pipermail/python-list/2000-May/03710...
Ultimately, who cares if python or javascript (excuse me, Python or JavaScript) are case sensitive. That's just how they are designed, and they weren't designed for beginners. Maybe future language designers though might not do something solely because it is the tradition, the cargo cult practice.