People misidentify one of the biggest challenges of building a SPA in a startup, small, or medium, sized org: taming the horde of junior developers coming into front end development via self-teaching, bootcamps, and CS programs, who more often then not are writing significant parts of the product to be shipped.

There is a huge need for them to have abstractions which provide structure and consistency without being hidden behind too much magic. React in general, redux, and hooks, to me all work to fill this need in a way which is superior to alternative tools. Specifically you can learn how they work in ten minutes or less.

Of course ecosystem variety is critical and there are no doubt many cases where mobx, non-hooks, or similar implementations are the better solution.