[Izkata]

innerHTML loses all local state, such as which elements have focus or where the cursor is in a text field. Back when React first came out and people were getting used to the idea of VDOM diffing, they had demos front and center about how by using those diffs to only change what needed to change, such local state wouldn't be lost.

This in theory could do something to copy that local state over, or diff the two DOMs directly without a VDOM (though from the sound of it, it probably doesn't).