个人在quora上提的问题，得到40+的答案，将近100k的浏览量，其中不乏优质答案，详情可看连接。
https://www.quora.com/Considering-the-different-properties-among-programming-languages-why-dont-we-just-pack-all-of-them-up-and-implement-them-in-one-programming-language-Why-are-there-so-many-programming-languages-in-CS