A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Equating a "10 minute" setting with AutoSave demonstrates a lack of understanding of the feature.
It is important to differentiate and use the proper terminology in our discussions. AutoSave and AutoRecover are two DIFFERENT technologies. Heck, even Microsoft can't keep it straight in their own documentation - so it's no wonder anybody is confused.
AutoSave is a new feature that works in conjunction with OneDrive and SharePoint sites to continuously save and share your file - when you have an Office 365 subscription. It is different from the legacy technology called "AutoRecover" which saves your file periodically depending on the setting you have set in options. In your case, "10 minutes."
When AutoSave is ON, AutoRecover is OFF. AutoSave saves your document every few seconds, and creates a new revision history every 10 to 15 minutes based on your version history settings in OneDrive / SharePoint. AutoRecover saves your document every several minutes only when you have been completely idle in the file (this is clearly not right but this has been proven during testing, maybe a bug, but still fact). So much as clicking on another worksheet will start the timer over before AutoRecover saves a copy.
When AutoSave is ON the File -> Save As and File -> Save are removed. Why? Because your file is always being saved - continuously.
AutoSaved previous versions of a file are accessed from the TITLE BAR in Excel or from the OneDrive / SharePoint web portal. AutoRecovered documents are located from File -> Info -> Manage Workbook.
Now, I'm not saying there aren't bugs or issues here. But, unless the two distinct technologies and the proper expectation from both of them is fully understood we will continue to blame the software when there is really just a misunderstanding about the features and how they work.