There was no control group to check how significant that number (13 out of 30) was[1]. This article is very misleading (but at least mentions that the study was not peer reviewed).

[1] http://pielot.org/pubs/PielotRello2017-MHCI-DoNotDisturb.pdf

I've been using do not disturb mode and airplane mode daily in the evening until early morning. It makes for a great break from the constant barrage of notifications.

I've recently taken to turning off all sounds, including vibration. I still get notifications, but they're reviewed on my terms.

Yes I miss a few calls, but there's rarely anything that can't be followed up with (I put my phone on vibrate if I'm expecting an important call), and the peace of mind it brings (and reduced flow interruption) has been fantastic.

Same here. Clients and my mom are annoyed and send messages like "are you reachable now?"...

I just can't make them spell out what they want; it has to be the phone...

I found disabling all but SMS/WhatsApp/calls to be sufficient.

I guess if you get a lot of those each day it might be a problem for me I might get a single message or two each day.

I also allow notifications from a single email address but that's because it gets errors and not much else sent to it.

Everything else can be handled when I feel like it.