Tailwind UI is not a theme, it's a component library. The target audience is different.
I bought this the moment I got the email about it this morning because this is going to help my productivity in building web applications. When you use Tailwind, you aren't using a pre-made theme as you would with a bootstrap theme you buy, you are designing it from scratch.
With this UI kit you'll get some nice building blocks to become even more productive, but you'll still end up modifying stuff to make it yours.
I've found some themes pretty difficult to modify, or that it makes working with third-party components harder (say for Bootstrap), but since Tailwind UI is built on Tailwind, it won't be difficult to tweak.
Compared to what? If you look at any agency license (use on as many sites as you want) for themeforest WordPress themes, they are about the same price, if not higher. I guarantee you, they‘ll make a million bucks on launch day!
I don't think this is exactly comparable to a theme, but I do agree that it's priced too high.
Not only that, but I think the pricing model is wrong; lifetime access for a one-time fee is a big mistake (and one I previously made with a startup).
As a developer, I understand that you need a predictable, repeatable income stream to keep going - and if I'm going to invest in something like this, I want it to keep going. I'd far prefer to pay something like $49/y instead of a one-time $249 fee.
For example - http://landrick.react.themesbrand.com/ is 17$.
https://g-axon.com/wieldy-ant-design-react-redux-admin-templ... is 24$ (which uses ant design)