Why two Shift keys in extended layout?
I'm a great fan of moving cursor left and right within the texts. That's where the left and right arrow keys come in handy. Gboard did a great job adding the option to slide within the words using space key.
On SwiftKey keyboard, you get an option to enable Extended Layout which adds the left and right keys beside the spacebar. But it also brings another trouble. It puts a giant shift key ⬆️ on right side when there is already one on left.