The writing system you mentioned fell out of use centuries ago, but there's another East African writing system which has been in use for millennia and is still

The writing system you mentioned fell out of use centuries ago, but there's another East African writing system which has been in use for millennia and is still in wide use today: https://en.wikipedia.org/wiki/Ge%27ez_script https://en.wikipedia.org/wiki/Ge%27ez_script