Further research how bots handle HTML streams

[brillout]

It isn't clear what bots do when then encounter an HTML stream. Do they await the HTML stream to end or do they abort?

In particular, it isn't clear how the Google Bot behaves. Google ranks fast websites higher and, therefore, enabling streaming for the Google Bot may improving ranking; is that the case?

By default, react-streaming disables HTML streaming for bots. Is that a sensible default?

See: https://github.com/brillout/react-streaming#bots.