What features of Slate put it closest to Notion's editor compared to other frameworks besides the obvious one that Slate's view layer is built on top of React?

What features of Slate put it closest to Notion's editor compared to other frameworks besides the obvious one that Slate's view layer is built on top of React? Is it somehow that Slate is more suitable handling asynchronous data (e.g. server generated uuids for each block, recursively fetching content for each block and its children)?