Yes, it's possible. After a while, even if the device is still considered modern by our standards, it's not modern nor profitable enough for the company itself to continue working out every single last bug and keep sending out updates. This is the same thing that happened to old Windows operating systems like XP and 7.
The company wants to only pay expenses towards developing future technology and what is profitable in the now.
But there are groups and forums out there with people dedicated to certain platforms. Finding one specifically for the Note 8 may be difficult as it's a niche thing, but I'm sure there is a community out there on the internet for Note devices in general. ☮