The ancient php idea of mix data fetching and rendering instead of wait until everything done for least `TTFB`(Time to first byte) is still hard to do for a lot

The ancient php idea of mix data fetching and rendering instead of wait until everything done for least `TTFB`(Time to first byte) is still hard to do for a lot of js framework today. You generally need to add tons of hack to the framework so you can print your site header before fetch and print the article body completely. (Which a phper will ask you "why you don't just print it?"). React and vue has add limited streaming rendering support recently, but they are still very limited and you need to met some constraint to actually use it. It's really something `old is new today`.