As someone younger who grew up in a time where you would get a cell phone during teenage years, I can't say I empathize with your view of "my device" vs "interruption device".

Although there are likely an overwhelming majority of my peers who do have an interruption device phone, I refuse my phone not be My device, and I explicitly buy phones that I know I can customize (unlock bootloaders, flash roms, or simply just know it has the interop capabilities I need to make it my own). Where this is in opposition with your statement is that I do have social media, mail and even work email on my phone, I just chose to customize it to not be interrupting to work and personal life (though obviously that line is different for everyone).

Of course I'm not saying your way is wrong at all, just sharing my experience.