DropBox is the Electron client of file sharing. They could make native apps that use native apis and get vastly better performance in time, power, cpu, and probably memory — but then they’d have to create and maintain a bunch of native apps. I know it’s common to hear HN comments like “they have the money/skill/opportunity to trade up to a better platform for more effort”, but everything I’ve seen says that it’s much harder to make that choice than to stick with the tech-debt you already have.

Note: I’m not saying it’s literally an electron client. It’s an analogy. :)