It’s more like Slack than Whatsapp IMO. It’s not so streamlined and using it on multiple devices is definitely mainly for tinkers. Or at least it was couple years ago. That cross signing through devices was everything but intuitive.

And THE feature everyone I know misses the most is giphy/tenor support, which is kind of dumb, but also really understandable. This and similar nice to have features are still lacking.

Is Matrix better for the users privacy? Definitely yes! But is it better user experience? Well, kind of almost, but not yet.