bug
If your selection starts at the start of the editor and is expanded, and you press Control Backspace
(as in you're doing Control A, Backspace too quickly and don't let go of Control quickly enough) it won't remove anything and instead just collapses the focus left. This does not match regular text field/textarea behaviour.

Same behaviour as <textarea>/<input/> where it removes the selection anyway.
The control-backspace has a bug, and it will be fixed in https://github.com/ianstormtaylor/slate/pull/1888
There's still a bug regarding this - if the first node in the editor is a list then select all + backspace will not delete the list wrapper (ul/ol) which makes it impossible to erase the list wrapper.
Most helpful comment
There's still a bug regarding this - if the first node in the editor is a list then select all + backspace will not delete the list wrapper (ul/ol) which makes it impossible to erase the list wrapper.