To be honest, there isn't much reason to use this. The Microsoft Admin portal has an simple export button that does the same thing.
I only made this because at the time I didn't have access to the admin portal because it was managed by another department and I needed to see who has a Office license. 

When you try to sign in any MS 365 app like OneDrive, Outlook, Word, etc. the signin works but it never actually signs you in.
You notice that the app is still not showing files and remains unlicensed.

I was tasked to make backups of our Sharpeoint 365 environment with Veeam. Not long on the first backup the first few warnings appear:
Processing site <sharepoint site> finished with warning: Cannot change web part export mode to ‘All’, because custom scripting is disabled for site:

If you have web parts on the site and with modern authentication, this is by default not allowed and the cause of this issue. The sharepoint administrator will have to manually enable the setting so that backups can be made.

Microsoft 365 has way too many options to set the language and they don't sync up with each other. 
For example, when buying a tenant you have to choose a language this language will be the default for everything Microsoft 365. 
However, if a user wants to change the default language for Word for example, one would think to do this under his language settings but this changes nothing and this seems to only change the language for other things besides Office apps like the portal page