My only experiences with Wix websites have been completely negative. Slow load times, non-functional interfaces, menus and the like and terrible designs (as in, presentation layout and formatting of graphics and other objects) have been the norm for me. It's cheap, and folks are getting what they pay for.

Wix has been pushing the envelope on React Native and are one of the larger organisations who have embraced it fully.

They've released a few videos on YouTube talking about their move to React Native and their underlying infrastructure.

We used their react-templates extensively last year and the experience was mostly positive.

This year we are moving from React to Vue. In parte because we prefer working with HTML + directives than JSX, but also because Vue is more pragmatic and much nicer on beginners and people coming from jQuery.