I think there's a mistake, as you are comparing apples to oranges. The reason why Moment.js is being subject to this scrutiny is because both day.js and luxon do exactly what Moment does, but they are leaner (day.js even has the very same syntax).

This is obviously not the case with Angular and React and even if we put others to this comparison like Vue and Svelte. They are all different, have different specificities and have different target uses. React can surely be much leaner than Angular, but the latter has included many features only attainable in React via external libs. They aren't even in the same category, with Angular being a usually called a "framework" and React being a "library".