Comment by kamaal
Im not sure how this is a negative merit for React.
Besides if you are a small company, or a start up, your job is to get things done. Not to embark on a global technology crusade to push your favourite tech.
By and large the best thing about react is the overall ecosystem, libraries, talent and ubiquitousness. And thats a good thing.
It isn't necessarily a bad thing, but it doesn't align with the idea of how good react is or the technical merits of it.
I also am not saying teams I have been on that picked react made the wrong choice. That's all in context and as you said startups are often in the "get things done" mentality where tech debt won't matter if you can't survive long enough for it to matter.