in some way be able to select a group of messages. either press and hold on one message and then scroll down and press on another and have it select everything in between. or press and scroll. or select the first message press option button and then scroll down to the other one and select it. then everything in the middle gets selected.

it's useful for deleting a large group of messages but not an entire conversation. unfortunately that's the only use that I see for it right now and I don't know if that's super helpful or worth the effort to make as a feature