The author lost me with "Tailwind is bloated." If it's bloated, you're doing it wrong. One of the main benefits is that you can run a command that creates a custom CSS file that only include the classes you need.
...and it's explicitly mentioned in the manual, which makes me wonder, how someone quoting it (and thus pretends that has read it), missed that part. Most points are pure FUD imo, except the one talking about vertical space, and I believe it's exaggerated.