What problem does this address?

In #51602 it seems this change made it not possible to have multiple modals open if they are not nested within each other.

We use WordPress components in a project outside of WordPress, the Day One Web Client, and have built our own modal handling infrastructure to open and close modals using a global modal state. We end up having multiple modals open that are not nested in each other, and with this when one closes they all close and that is not our intention.

What is your proposed solution?

It would be great to have a way to opt out of this behavior, maybe with a boolean prop on the Modal component.