And if you're still using React with Redux you're doing just fine for SPA development, as in you're actually still
modern and not merely fine. React Query is the only new development you listed that SPA professionals may want to think about, and even then only a little. It's a life convenience tool for making async calls to foreign APIs easier (for internal APIs you probably want RPC-like experiences with type and client generation).
Meanwhile MPA people are redefining the boundaries of work by marrying the frontend to the backend. They are doing some big re-architecture type stuff, and it is very interesting, far more interesting than React Query being the better Axios. If I had to lead with an argument about interesting changes on the SPA side, I would've lead with the ongoing improvements to CRDT libraries. It's niche but there really isn't much of a revolution going on otherwise on the SPA side.
