I don't know if you sussed it, but the idea of txting is that you can send messages to be received when the recipient is ready. That's how they differ from phone calls.

If someone wants to respond instantly to a txt that's up to them but that isn't what txts themselves are about. People often txt me when they know I'm busy. They txt me because they don't want to disturb me with a phone call. I don't call them clingy!!!

D'you get it now?