[jscholes]

> drag and drop Lists are notoriously difficult to implement because browsers provide little help when developers have to build drag and drop interactions. Developers using Base Web have the peace of mind that keyboard navigation is reliable and works well with screen readers.

FYI, their drag and drop sample doesn't "work well with screen readers". It's overly verbose and requires keyboard passthrough to operate. So maybe don't take any web designers at their word when they say you can just use their framework and forget about accessibility.