We've been using it for a little over a year. So far my biggest finding is that Tailwind works best when you have a UX team that is forced to play by the same rules. In that context, with a heavily chopped down tailwind.config, it comes alive as a utility. It can even act to proof mistakes in the UX work. A div with a 1rem padding, with a BG of neutral lightest and a text color of "primary" is a spec defined by class names and a mock. I honestly think that in uncontrolled environments without a singular design system and without configuration, tailwind can become a mess. I really do not care for the out of the OOB config, it is way too free on color schemes. You need a few people to play the rulemakers and constraint for it to be helpful.