What problem does this address?

There have been times when I wanted to add a block with InnerBlocks, and restrict all children of that block to the same AllowedBlocks as the parent.

What is your proposed solution?

Create an extra argument we can pass when setting AllowedBlocks to make that setting recursive to other InnerBlocks within the parent block.

I looked to see if someone else had requested this and was surprised to not find any threads. If there are other requests, please let me know and I'll remove this one.