Like you I keep them separate. Not just my phone. I don't do anything personal on work devices (don't log into personal email or banks, etc...)

But, I believe I'm in the minority. Most of my fellow employees have added corp to their phone. I believe most do personal stuff on their work computer. I get it, it's inconvenient. I've gone to offsites and given don't have corp on my phone I have to pull out my corp laptop to contact people and/or lookup stuff that they wouldn't. It would also be much nicer to set personal appointments or deal with personal things I need to during business hours on a laptop than my phone. On rare occasions I bring my laptop to work if I know I'm going to need access to my stuff even though all of it is in the cloud so theoretically I could access it from a work laptop.

I was once at an SV party and several Apple employees (3 women, 5 gay men, 3 straight men) said they all used their work laptops to watch porn at home or traveling. I was pretty shocked. Not that they watched but that they used work laptops for it. They all thought it was fine. It came up because, for some reason I mentioned I always take 2 laptops on business trips, my personal one and my work one. They said they never do that, they just take their work one and do personal stuff. I asked, what about porn and they all said they watched on work laptops.

That was a very long way to say I think people like myself who separate the two are rare.