I went the other way. I switched from the Samsung 5 a couple years ago when the Apple watch came out. I was pretty happy with my S Galaxy 5 back then but reluctantly dumped it to have that watch. What surprised me after a couple months is that I didn't need to carry a spare battery with the iphone 6+ It just gives me several days of battery. The other thing I thought was normal for all smart phones is the iphone 6+ never crashed. All my android phones would crash requiring a hard reset every other day and if I used it hard, several times a day! I'd also get these virus attacks with the Samsung that required a virus scanner just like I have to use on my PC's. This made the phone slow at times.
Since I'm old schooled I have been slow to adapt to the phone as my main device but the infrastructure that Apple has created with the iOS and other Apple devices plus integrated with Google Chrome and the cloud really makes things easier. I'm eligible for another upgrade this June but will see what the iphone 8 offers. As for the Samsung Galaxy S8, I'm sure it is much improved over the model I had and is probably as good as my iphone 6+ 128Gb version, but will it be compatible with my Apple watch and Apple AirPods that I really like? Then there is the Samsung phone bans in some locations. The biggest one was when a cruise line recently banned ALL Samsung phones. It was odd not seeing a single Samsung phone in use. Most were warned ahead of time but a few I saw having to have their Samsung phones quarantined until they returned. That problem alone would concern me in purchasing any new model until it had been out for awhile. Even if I would want to jump back on with the Samsung S8 or if the iphone 8 comes out, I upgraded and it blew up, at least I could return to my iphone 6+. With the Samsung, I would probably lose too much I now enjoy with the Apple infrastructure. So, sorry, Samsung I'm nor addicted to Apple convenience. Too many steps backwards to return to Android.