What webflow doesn't have to deal with compared to a tool for webapps, is that most websites are just static. Web apps have all this extra code mixed into the frontend for functionality - providers, routers, state management methods, api calls ets, all this extra stuff in your components that isn't just "view". Taking some generated static react and adding functionality is easy. But then coming back to a page 5 months later, and refactoring the design in Noya, and merging that new code with what's actually been built? Kinda tough.
It really depends if code export is a core goal, or more a side effect. There's a lot of value imo in a tool for designers, devs, business owners, whoever at a company to mock up an idea really quickly, with something that looks like their companies actual design system. Like the napkin sketch on steriods - but then still implementing it traditionally.
