I just learned about Tailwind CSS earlier, not deep level yet but its concepts. It's to bridge the gap between designers and developers, so now designers can focus more on the "design" part and developers can work on other parts of the system.
Comparing both Tailwind and Bootstrap isn't exactly a good comparison because they're built differently. Bootstrap is a UI library while Tailwind is a CSS utility framework.
Though I think you presented lots of good points here.
RE: Tailwind vs bootstrap: CSS frameworks comparison