m $new_shell killall -q emacs ||:
e Running main btrbk
-m btrbk-run -v $bbk_args $incremental_arg -m /o || ret=$?
+m btrbk-run -v --fast $bbk_args $incremental_arg -m /o || ret=$?
if (( ret )); then
bang="$(printf "$(tput setaf 5)█$(tput sgr0)%.0s" 1 2 3 4 5 6 7)"
e $bang failed btrbk of /o. restoring old host as primary