Definitely going to go with the iPhone X. I'll be getting one this year, I get new iPhones every year. I've had several Samsung devices and they always slow down and lag, and have issues. I like the fluidity of iOS and the fact that everything just works with all of my devices. I just feel that iOS is a better OS than Android at this point, same with macOS vs Windows. I just feel Apple's offerings to be more to my liking. I don't care about customization or other things on Android. I care about how fast my apps open, how fluid it is, and the lack of lag. I get a new phone every year, but slowing down isn't the reason. They stay fast for a very long time. I like new features/design. I really love iOS/iPhone for that reason. I also love the camera (the camera on my 7+ amazes me) and the other features of iPhone. I love iCloud, I love iMessage/Facetime, and I really don't see anything, let alone a Samsung to pull me away at this point. I'm a lifer.
You should use what you enjoy.
I never found the s8+ to lag. The stock launcher wasn't too my liking (any lag with that has been fixed via updates), so I use Nova. Nova is 100% fluid on my s8+, and the note 8's extra 2gbs of ram, and possibly the updated TouchWiz seem to have eliminated any perceived lag (based on reviews).
I also find widows 10 to be the more efficient, faster operating system. I actually sold my tbMBP because of frustrations with slow downs. The hardware, for the price, wasn't able to keep up with my demands. For less, I got a Dell XPS 15 9560 (i7 kaby, 16 gigs ram, 512 sad, 1050 gpu, 4k screen, fingerprint scanner, etc). It's the fastest labtop I own, or have ever owned (and I have owned several, including a few 15 and 13 in MBPs). It's almost as fast has my custom built PC, which I didn't think was possible.
But you like the features of Apple OSes, and if they are worth the asking price to you, then enjoy them.
Android and Windows 10 are similar. Out of the box, these days, they run great and can go match Apple's offerings (it's all preference at this point). But, it is much easier to bog down or ruin the experience, compared to apple, because of their open nature. At the same time, it is possible to tweak and exceed the functionality of Apple OSes, using Windows / Android.
I can't think of a feature the Apple's integrated eco-system offers, that I haven't implemented with Android/Windows (equal or better, not inferior). Most of these features Microsoft is slowly baking into windows and Android apps. There are also third party apps that achieve the same result. It's all about chocie.
But you are used to the Apple approach. My first smartphone was Android, and I was raised on Windows. Then I went to iPhone and MacBooks Etc for years. But I never lost my familiarity with the other side. I also never lost sight as he advantages and disadvantages of both (though again , reaching parity now). If you have you something for a long time, it takes a while to get used to a change, but if giving time you figure it out and you see the benefits. It's the advantage of being platform agnostic.
The problem is is that apple is continuing to raise prices, and make the ecosystem even more and more dependent on having multiple Apple products. Causing the overhead cost to either be prohibitive or completely lock you into their ecosystem.
I don't want to be locked into something like that, I have been before, and it's expensive to maintain, and it is expensive to leave.
That being said, do enjoy the Unix base of Mac OS, but Windows is baking bash shell into windows. It's experimental but will be rolled out in a month or so in a more visual way, via the windows app store. So far the Linux base shell has been Flawless in Windows.
Reminds me of the adage "You don't know what you don't know." I was an iPhone user for a long time, and I generally regarded them as the superior device.
