Glenton Samuels commented the proposal for the future WordPress admin materials and surfaces and laid it down very clearly why using React for it is a bad idea. And I fully agree with it.
Just to quote the conclusion, but it’s worth to read the full post:
A full React rewrite may look cutting-edge, but it threatens the broad community, the ecosystem, and WordPress’s future sustainability. Instead, modernizing via PHP + Interactivity API + modern CSS (including View Transitions) preserves backward compatibility, performance, and accessibility while delivering a polished, modern admin experience.
Glenton Samuels