This is fantastic. Have been doing things like this myself lately and have found it to greatly improve my productivity, but I need to do more.
Turning off email on my phone would be tough, though. I do a lot of deleting, sorting, and quick replying on my phone so I can get a bunch of emails out of my inbox before I sit down at my computer and have to deal with them. So for me, I’m not sure I’ll ever take this step.
Along these lines, here’s a helpful tool I came across the other day: Inbox Pause.