I'm working as a software developer with a main focus on Ms and sharepoint. I know this beast but the original dms features of sharepoint get replaced in O365.

I'm working as a software developer with a main focus on Ms and sharepoint. I know this beast but the original dms features of sharepoint get replaced in O365. O365 is moving to fast to use it for the next several years. Don't get me wrong, that's just for me as a customer.