The idea of humane messages is that they require no user input to close. I do like stacking idea, maybe a future release. For now, setting the timeout to be shorter, or forcing new messages provides a workaround.
I find messages that close themselves very inhumane; I can easily miss them if I look away or switch tabs, or they can disappear while I'm trying to understand them, with no way to bring them back.
My top feature request would be a 'stays up until dismissed or navigated away from' option.
My top feature request would be a 'stays up until dismissed or navigated away from' option.