to let people edit the same thing at the same time
just do it please
Stephen Semmelroth commented
Often, real, collaborative editing efforts require two people to update/edit the same text box at the same time. While O365 PowerPoint shows who is active editing and what slide they are working on, it does not actually show they are doing. Your biggest competitor, Google Slides, does exactly that and it's a huge pain and a source of frustration that O365 has not yet implemented real-time typing updates.