I also wish there were a way for me to send a low-priority message to my wife so that it didn't notify her regardless of her notification settings. We send each other news articles throughout the day but don't really want to interrupt each other. It would be great if there were a sender-side option that could enable this.
I've thought about using a shared document in the Notes app, or just use a different messaging app for low-priority stuff, but it seems like too much overhead. Does anyone else have a way of handling this?
IMO, no one should have have email that sends notifications.
If it's urgent, the sender will call.
Text messaging is asynchronous communication, if someone is expecting an immediate response, they should be calling.
ADDED: Where I work, chat is a more time sensitive than email but basically no one phones out of the blue.
I would much rather someone press a button to say "This is very important, send it now" over calling me where I have to scramble to turn off my music, put my headphones on, etc before answering.