Could we pass classes to theme blocks?

I’m experimenting with theme blocks, and one thing I’m noticing is that it’s slightly limiting to not be able to pass classes to theme blocks.

For example, let’s say I have some statically rendered theme blocks. These might all be treated as slides in a slideshow within my example. However, the blocks themselves aren’t exclusively slides - they’re just treated as slideshow slides within my particular section setup. If I need to have a certain class on every slide within my given section that’s specific to slide functionality, I can’t actually do that with either dynamic or static theme blocks.

So mainly, what would be important to me is the ability to conditionally add classes to theme blocks based on the section-specific context.

Wondering if this feature might be possible to add?