If your job is to write UI frameworks, by all means do that Otherwise, yes, you do need React (or something like it). Don't waste time re-solving the problems

If your job is to write UI frameworks, by all means do that Otherwise, yes, you do need React (or something like it). Don't waste time re-solving the problems these frameworks were created to address. Spend your time creating value for your users. Building bespoke state management systems is not needed.