Safety is paramount for us and for our customers! But while we of course focus on what we can do with back-ups, encryption access control etc; the biggest risk for data loss still remains with the individual user*. Versioning documents make sure that simple mistakes do not lead to irrecoverable loss of information. That's why we now version all documents in Webforum. That way you can feel secure that the old version is always safe when you and your colleagues make changes.
*”Microsoft says that the most common form of data loss in the lifetime of SharePoint Online is down to unrecoverable changes. They are looking to prevent this data loss by introducing mandatory versioning of documents. So, unwanted changes will be able to be undone as well as other recovery scenarios being covered.”
https://www.business-agility.com/microsoft-is-rolling-out-mandatory-versioning/