Part of what you lose other than large files is little features that need high performance to work. For example Sublime's fuzzy finder previews files behind it

Part of what you lose other than large files is little features that need high performance to work. For example Sublime's fuzzy finder previews files behind it as you type, VSCode/Atom/Emacs can't load files fast enough to do that. Sublime's minimap beautifully renders each character in the correct shape (at small size) using the same renderer as the main body. The DOM memory usage and thrashing when you type an unclosed quote and the whole file gets re-highlighted would kill Atom/VSCode if it did that. Also the little things just have far lower latency. Opening a file, typing in the fuzzy finding window in a large project, deleting a closing quote that re-highlights the rest of the file, etc...