The MS team worked very hard to make it snappy; e.g. it doesn't dump the entire file into the DOM if it is big (but rather materializes it as needed, and remove

The MS team worked very hard to make it snappy; e.g. it doesn't dump the entire file into the DOM if it is big (but rather materializes it as needed, and removes sections not viewed). That's the kind of tricks that the DOM (so web and also Electron) were supposed to make irrelevant. Write an app "naturally" with Electron, and it will likely be slow because of the DOM <-> data impedance mismatch. That's what slack is guilty of, but the ability to do so is Electron's claim to fame.