Unrealistic timelines, implementing what should be backend logic in frontend, there's a bunch of ways SPA's tend to be a trap. Was react a bad idea? Can anyone point to a single well made react app?
React can have all the niceties and optimization in the world, but that fails when its users insist on using it incorrectly, building huge tangled messy components and then wondering why a click takes 1.3 seconds to deliver feedback.
IMO it's the MAIN thing to understand about React—how it renders.
Regardless, now I'm the one with egg on my face since the new compiler promises to eventually remove the need for manual memoization almost entirely. The "almost" still fills me with fear
https://alexsidorenko.com/blog/react-render-always-rerenders
It's a set of 6 short and sweet posts that breaks down rendering behavior, memoization, and relevant hooks