Different syntax is easier for different people to learn. So by having languages with many different kinds of syntax programming becomes more inclusive.
I have a very hard time reading JS, the single symbol blocks just all bleed together for me visually when dealing with nested blocks.
I do.
I'm not intelligent (or silly) enough to create my own platform/language but if I were, windows compatibility would have been on the top of my list, second would be making JS developers feel at home (read: C syntax); or Python, if I'm being adventurous.