Why we need an upgrade when the system is running smoothly. If you have look at the others UI, App drawer, Home Screen & Widgets they're no worth in comparison with Samsung. I used many devices other than Samsung, even know The Brand NOKIA is worst in all aspects.
Don't worry about updates on other products, I simply ask you all one thing, compare the Samsung apps with other devices apps, say for example MY FILES, MY GALAXY, SAMSUNG INTERNET, SAMSUNG PAY, SAMSUNG PASS, Customization apps - SAMSUNG THEMES AND WALLPAPERS, LOCK SCREEN., etc.
Looks like the only reason you want an update is because your friends using Pixel phones are getting updates quicker.
Major OS updates for Android in recent times (after Lollipop) have extremely few changes and improvements even in phones running on AOSP (Oppo's OxygenOS on OnePlus, Nokia, Sony, HTC's SenseUI and Pixel/Nexus line). So when it arrives on phones running heavily customised skins as in Samsung and LG, the changes are even more insignificant for an average user. My sister couldn't even notice any difference in her S8 running Nougat and now Oreo beta.
So what I'm saying is that if you're buying your phone just for watching the OS version number in your settings change faster than your friends, buy a Pixel phone.
Samsung pushes UI changes only through major OS updates. S7, S7E and S6 family got nougat way before S8 launched with new UI, so they are still with old UI. The J series and C series phone got their nougat update sometime in August, so they got the new UI along with it.
If the new UI (which is only a cosmetic change with no new major features) is very important for you, just hold on till end of February when S7 family might probably get the Oreo update with the new UI
Thanks for being with Samsung and for sharing your feedback. Sir, Samsung offers you the best value on the product released. Updates are rolling out by time to time for the devices, However it totally depends on the availability and compatibility of the update with the devices. Be sure to hit ♡ when you find an answer that works for you.