Well, usually poor resource utilization means bad design all around. You can always buy more powerful hardware, but it won't fix something that is fundamentally flawed. Text editors are very personal to me. I spend a lot of time learning shortcuts and tricks that are easily cross-platform and portable, and Vim is very easy to do that and is still actively maintained by a great community of well-versed developers that aren't just getting another paycheck from a mega-corporation pretending to do some social good.