Part of me wants to write a really long response. The other part of me wants to just write this and leave it at that. Alright,
I can tell which part of you won out.
As for me, I'm sticking with Windows 10 on my phone for as long as I can have Windows 10 on a phone. Heck, if I can get Full Windows 10 on ARM on a 7" tablet with SIM support that I can make cellular calls with, I'd be thrilled with that and go with it. I never hold my phone up to my ear to take a phone call anyway. It's always a Bluetooth headset. Always. Okay, not always. Speakerphone if I'm doing a family call so my girls can chat with the grandparents.
My wife and I bought Lumia 640s over 2 years ago for $30 each, upgrading from a Lumia 635 which upgraded our 520s. Worst case scenario will be I'll carry around a 7" or 8" Windows 10 Tablet that has a Data SIM and a "dumb" flip phone for phone calls. I'll never go Android or iOS. I know, "never say never" and all that. I just did. I meant it. I meant it like I say, "I'll never kiss a hippopotamus on the mouth." Believe it.
Come to think of it, flip phones were so much easier for phone calls. I do a very small amount of anything on my phone. I make phone calls, have an occasional text, and in a pinch when I don't have my laptop with me, I use it to check product reviews before deciding to purchase something in a brick-and-mortar store. My new 8" tablet will be here later this week, and it's the same dimensions as the Samsung Tab A 7" tablet (way to go with the large bezels, Samsung.) I can actually hold it with one hand comfortably. Don't expect to swipe one handed, but it's what I'll carry for those situations so I don't need to use my phone. I also use my phone to check gas prices before getting gas. GasBuddy web site works fine for me, even since they discontinued the app, I can still use it.
The only other thing I use my phone for is to use it for my Bible in church. I think it's too small for that, but my 8" tablet will be here before next Sunday, and I'll no longer use my phone for that either. I'll just leave it in my vehicle.