It's not really a moral argument that there shouldn't be a business model but more an opinion that you might now consider verified as a correct one that the business model just wasn't there. I agree that there probably never was one.

Selling to developers just is very hard. The reality of course is that this competes in a space full of other people's OSS attempts at solving the same problem. That just puts an upper limit on what you can charge and who is going to even consider paying at all. And whatever that is, it was nowhere close to what they needed it to be.

AI made the whole proposition less valuable. I actually like tailwind as a solution. But it was always a short cut for people who didn't want to reinvent all the low level CSS hackery on every project they did. It's why I like and used it as well. But I stopped doing these things manually at this point. AI coding tools will happily spit out the raw CSS as well. And the irony of course is that because of tailwind's popularity, generating it was easy as well.