With available Plugins online, you can easily turn your terminal in vim into a powerful IDE.

Customizable keys for every command, syntax highlighting and background templates.

Vim has loads of features and customization tools for editing. Autocompletion, search, looking up the definition of a function (using tag file), multiple tabs, string replacement, smart indenting, keyword colours are the primary ones I use almost every day. Not to forget, vim has a good documentation to lookup when in doubt. On UNIX, it even allows seeing the man pages of functions we are using. Having multple modes like editing, command and visual are all good. Editing huge files is supported by few editors and Vim is among them. I have used it to work with data file in a few Gigabytes.