Multiple cursors in Sublime Text. Made it incredibly easy to do repetitive edits to json data or html templates. VS Code does a better job of cursor management

Multiple cursors in Sublime Text. Made it incredibly easy to do repetitive edits to json data or html templates. VS Code does a better job of cursor management now, but I think that was inspired by sublime text. Language and date time services like Moment and i18n. Huge productivity gains from having off the shelf solutions for multi-language features. Node.js and Express got rid of all the cruft from backend API development. It’s a breeze to spin up a new API, whereas years prior needed a fairly strict environment setup to run reliably.