Most webapps out there will never need the level of complexity of SPA frameworks. They will work completely fine for the foreseeable future with something like htmx. The GitHub notifications update bug is more of an eventual consistency issue than a ‘forgetting to update the UI’ issue.
Do you like programming in Blub? Because you're telling me that Static Pages are not good enough but React is too much, only Blub is the one true ideal.
One man’s React is another man’s Blub.
Obviously you missed the entire point of the conversation if you think it is "React good". It is about a paradigm, one that is grounded in mathematical soundness, of course, that doesn't mean the implementations out there are perfect and flawless, but that is not the point.