I did not realize that Tailwind had spacing utilities. I know CSS and I've just been doing stuff like gap-3 for flexbox'd containers etc... It never even occurred to me to not do that, because like the article says, I know CSS.

Also, I really don't think tailwind is a replacement for regular CSS. I've found more success mixing them. "Promoting" a series of 10 utility classes to a semantic class name when needed.