Yep HHKB is a great example of both split backspace and split right shift. In the case of the HHKB specifically Fn+tilde is Del, but most boards allow this to

Yep HHKB is a great example of both split backspace and split right shift. In the case of the HHKB specifically Fn+tilde is Del, but most boards allow this to be remapped.