Make a real autosave feature
So pretty much every competent program now has an autosave feature. PowerPoint still doesn't. It saves every once in a while and it crashes so often you have to save every time you type a letter and hope it doesn't crash while saving. Therefore, a real autosave feature would be great where it doesn't just use a periodic save function as a fake autosave. Also, PowerPoint is a hilariously unstable program and crashes all the time for no good reason.
Thanks for your feedback! Office 365 users now have AutoSave for all files stored in OneDrive or SharePoint, which enables us to sync those changes, including to others in real-time if they are collaborating with you simultaneously. For local files, you still have AutoRecover, which can help recover information if you forget to save. You can configure that setting via File > Options > Save.
To learn more about AutoSave, please see https://support.office.com/article/What-is-AutoSave-6d6bd723-ebfd-4e40-b5f6-ae6e8088f7a5