React can be used fine for static pages. That's orthogonal.
React does have server components which are completely rendered server side, ala PHP or similar. Even SSG/pre-rendering support.
I see Corporate Memphis has even infected status pages now.
Tangent to this but I saw a link to metastatus last week and thought it would be a status page for other services' status pages. This makes it sound like a useful thing now, too bad the name is taken.
Could call it metastasis, apropos when one outage cascades into others.
Such irony...
It could save others from clicking on downed sites, but not itself.
During the outage it was cheerily reporting no problems