I'll take this anecdote and counter it with the success of Bootstrap. You could have been using it for an entire decade now. There's a robust ecosystem around it to this day.

Bootstrap's future is increasingly uncertain, of course, under Twitter/X. Tailwind as the "new bootstrap" makes a decent amount of sense.

These frameworks aren't an excuse to ignore and misunderstand the underlying technology. It's worth understanding CSS, but these abstractions can really speed up development time, especially if your job involves more than "front end development" (which is still true for many of us).