An interesting approach to using data attributes to drive CSS utility classes. I'm not sure I like the overly granular control (it feels like it falls into the same category as Tailwind, but now with even more syntax and boilerplate) but I always enjoy Andy's takes on Grid structures and this is certainly a novel approach to that.

On BEM and why more modern approaches like CUBE are advantageous:

But, I’ve come to realise that BEM reduces instead of increases clarity and doesn’t help separate default styles from variations in the way that data attribute do.