Trying to find answers for the question "Why is this file type blocked from being uploaded into SharePoint"

At least once a month - sometimes much more frequently - I get calls from users asking why the file extension they "need" to upload to SharePoint is blocked.
Most recently, it was a Microsoft Access database that the user was attempting to upload to a document library. Before that, it was a shortcut link (*.url). And so on.
Is there a reference document which goes over the reasons why specific file types are blocked?
Thanks!

Each blocked file format has it's own reasons for not being allowed to be stored on a SharePoint library.
Some of them are blocked because they would be processed by SharePoint Servers during the upload/download sequences, thus, possibly corrupting the system ( like dll files ). Others would cause Crawl to break ( url files ).
The Access database files are blocked for two valid reasons. First, because saving "live" to those files using Windows explorer window ( WebDAV ) doesn't work. Second because SharePoint product managers want us to use SharePoint lists instead.
And it does makes sense.
If you're in the middle of a migration from file servers to a SharePoint solution, your people could use these situations to stop and think about it for a little:
Really ? Now that we have SharePoint, couldn't we do things a little bit differently ?

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Trying to find answers for the question "Why is this file type blocked from being uploaded into SharePoint"

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