We are still considering this feature for future releases, and will continue to update the status when it changes.
44 votesAnonymous commented
Quick look (á la Skype) of a file, downloading and showing the downloaded file in Explorer/Finder and opening the file in a correct application are necessary features for Teams.
Hate to be the bearer of bad news. This item has been declined. There will be no work to hide or remove the reply button.
As many people have commented, a big ask is to help improve how people distinguish between giving a reply and starting a new message.
For that the focus will be on this item. “Better visual delineation between `Reply` and `Start a new conversation`”