Hi Axel,
Thanks a lot for the quick, detailled and helpful response !
By "Real world MS Office use cases", I mean common things MS Office Sharepoint users really do in practice. Like for example "saving documents". If you have to tell users "this is Alfresco under the covers, so you must not do [long list of usages]", I wouldn't consider it covering a decent fraction.
Regarding stability, I mean "extra headaches admins face" when using Alfresco instead of Sharepoint providing the SPP server part.
cheers
Andreas