It's a difficult trade-off, even for me as a user. The fact that I can load Slack on all my devices and in the browser definitely played a role in my adoption of it. The fact that Slack is dog-slow and a memory-hog on my MacBook Air, on the other hand, has kept me from using it as a central part of my own work. Similarly, I am actively pushing everyone I communicate with the switch from WhatsApp to Telegram because the latter has a performant native app.

If I were to build an app where cross-platform support was crucial, I'd probably start with Electron as well because of time and budget concerns, and switch to native if the app 'takes off'. But on the other hand, I can imagine there being serious risks to building out an entire platform that way and having to rebuild it from scratch later on. Maybe there's never budget/time for it, leaving me locked in?

I suppose React Native could help in that regard.