Sorry, but $mod+BackSpace is too close to Alt+BackSpace

... which means "delete last word" in Bashese/Emacese so I often press
it several times in succession,

Although I should not tolerate own typos, I'm also really getting tired
of accidentally tearing down random windows.  Sorry, this is just too
destructive.

dotfiles/i3/config

 bindsym XF86AudioLowerVolume exec "bmo au down"
 bindsym XF86AudioMute        exec "bmo au flip"
 
-bindsym $mod+BackSpace       kill
-bindsym $mod+Shift+BackSpace exec "i3-nagbar -t warning -m 'You pressed the exit shortcut. Do you really want to exit i3? This will end your X session.' -b 'Yes, exit' 'i3-msg exit'"
+bindsym $mod+Delete         kill
+bindsym $mod+Shift+Delete   exec "i3-nagbar -t warning -m 'You pressed the exit shortcut. Do you really want to exit i3? This will end your X session.' -b 'Yes, exit' 'i3-msg exit'"
 
 mouse_warping none