First, ultra50, Hotmail is the principle Outlook derivative: it, intentionally, acts similarly to Outlook—including in misbehaviors.
The direct tests of Gmail showed it to not have the misbehavior. Yes. It displays with attachments “inline” with other items and text, but it still allows users to perform bulk attachment operations (such as bulk-saves).
The one person that claimed otherwise, failed to provide further details to substantiate their claim, even when directly challenged.
Additionally, I am but a fellow user, like yourself. I have no special relationship with Apple.
I’m sorry if you are having difficulty understanding the answer to this tissue.
It took me, and others, a fair amount of time to disentangle the actual issues, from the descriptions people were writing. We read and wrote questions in multiple Discussions on this very issue. (Many are far more extensive, and older, than this one.)
However, with time, especially with the nature of the various workarounds, we (not just myself) were able to work out the root issues and causes: all lines of evidence ended up pointing to the same culprit.
Sure. There was a change in either the default email authoring format used by Apple Mail, or in the Simple Mail Transfer Protocol (SMTP) Internet standard, used in transferring email to email servers (such as Microsoft Exchange servers, as used by Hotmail), or both, in the transition from iOS 13 to iOS 14.
As it turns out, such simply triggered the preexisting issue already within Microsoft Outlook: an issue, as it turns out, many had run into in earlier iOS versions!
This is simply an example of the fragility I wrote about!
Yes. Unfortunately, not all issues have simple causes with simple solutions.
However, once one fully understands this issue, there is a single, simple solution: get Microsoft to correct the unique, errant behavior of their Outlook software, and its derivatives.
Just because Microsoft tends to “drag their feet” on Internet standards compliance, will not prevent Apple, Google, and others from moving on with standards compliance.