And we come to a very common misconception. ZRAM does not take up space in your internal storage or use it at all.
It never has, never will. There's an entirely different technology that does use your internal storage but that only exists on desktop hardware called zSwap. zSwap does not exist on Android.
RAM Plus is never going to harm your internal chip in anyway. OEMs are not stupid enough to let something write/read constantly from the internal storage of your phone. Forget the long-term health of your storage for a moment and think about this.
Your phone is probably already constantly reading and writing to your chip albeit in small amounts. Imagine adding more work to the CPU and chip over on top of the constant activity. This going to affect your daily performance noticably let alone long-term chip health. Nobody wants a laggy phone from day 1.
So why does Samsung say they use the device storage for additional RAM then? - Clever word play and marketing for the general masses. If you think about it, your system RAM is also technically storing data. They never mention which storage RAM Plus uses specifically.
Chapter 4 - Conclusion
All of your Android phones from every single OEM have always had RAM plus turned on. Even from years ago. Google pretty much recommends having RAM Plus turned on since it allows better memory management for the OS.
It does offer performance benefits under high memory pressure scenarios, but today's phones have ample RAM that the average user won't push the phone as hard.
It does have downsides but the benefits outweigh the downsides IMO and that is why Samsung does not truly turn of RAM Plus even when you turn it off in the settings.
