Vim, and it probably saved me way more than 100 hours. I use for coding (C++/JavaScript), for writing academic publications (dissertation/papers) and for writing e-mail (through mutt).
I've used it so much that it is second nature at this point, and moving to any other editor without my ever growing set of macros, etc would significantly impact my productivity.
I've used it so much that it is second nature at this point, and moving to any other editor without my ever growing set of macros, etc would significantly impact my productivity.