Based on what I read tis was not a matter of testing (but I understand what
you stated).

>
It is a shame that Microsoft did not update mapi_stub for backwards compatibility
as they have broken so many applications.
<
MS simply chose not to make this compatible, pushing MAPI out by design.


Tom Krieg <REMOVEtomkCAPITALS@sdassociates.com.au> wrote:
>Microsoft now rely on its users as its army of unpaid beta testers. Net

>5.0 is broken in Visual Studio with numerous issues. I'll be waiting 
>until February to see whether all the show-stopper bugs are fixed before

>I migrate to the latest and greatest NET Core. That's also why I delay 
>Security updates and feature releases in Windows 10 Group Policy until 
>fixes are released for the new bugs.
>
>On 8/12/2020 12:25 pm, Leslie wrote:
>
>> In fact, to me it seems that they no longer do any actual testing 
>> anymore and are a shadow of their former selves in terms of quality. 
>> Even a simple thing since 1990 - assigning the default file extension

>> associations is now broken.
>>