Does Microsoft have plans to introduce an "add version" button in the near future?
This button would allow the user to select an existing document, select a file for upload which is then added as a new version to the exisiting document.
Currently (at least that I am aware of) the only way in SharePoint Online to add a new version to an existing document is bij uploading / drag-and-dropping a file with the same filename to an already existing document in the document library. The user then is prompted whether he/she wants to replace the document (and therefore adding a new version to the document)
In my company, we have a lot of official published documents that need to be upgraded from time to time. Adding this button saves a lot of work for the users.