[mdtusz]

Why are people still flying 737's? Why cling to 1970's airliners?

Just because something was created long ago does not mean it hasn't improved. Vim and Emacs are both extremely featureful and powerful editors and many people prefer to be able to pick and choose specific tools that do their jobs extremely well.

It's not about using "old" technology - it's about using a tool that excels at its targeted task, and letting you choose the best tool for ancillary tasks like searching, formatting, testing, debugging etc.