What problem does this feature solve?

Trying to override antd styles requires the selectors to be more specific than antd's selectors. When using CSS utilities such as tailwind, the only way to increase specificity is to make all properties !important, which then becomes even harder to override. By giving the option to wrap antd's styles in a cascade layer, it will be much easier to cleanly override its styles when needed.

What does the proposed API look like?

<ConfigProvider cascadeLayer="framework" />