I came into Vim pretty happy with my other tools (a very-enhanced Sublime Text 3 and JetBrains IDEs)...I wasn't trying to learn Vim, I just had to. Vim is now basically my one tool. That and tmux...and more of the stuff I was using tmux's features for I'm doing in Vim. Both tools are definitely irreplaceable for me at this point, but vim much more than the other.