Real-time messaging has been a great invention for many of us, except, when the time is not right, those messages could get more annoying than a wood-workshop at full volume next to the ears, pushing up those stress levels to the limits; Especially when you want to do a task which requires full attention at hand.
Everyone with a smart phone is mostly connected 24/7 to various apps, like Facebook, Instagram, WhatsApp, Tumblr and (many) more. This gives the advantage to be reachable at all times, but also brings a burden to be “too much” connected to the on-line world, bringing extra sensory overloads through that (super fast) connection of your phone.
Most people want to (and can) be reachable 24/7, but with autism and ADHD, it has its perks, especially when being in a mental state where there is no more platform to communicate actively with other parties. Most people see real-time messaging as granted and can become mad when you do not respond (in a timely manner) to a message being sent to you, making the anxiety and stress only raise in level.