Good to know. Is there any difference between the Hong Kong and US version?
I used to root my phones for quite the same reasons. I stopped using Greenify ages ago though, I don't think it's necessary on modern phones. And I'm not 100% sure about EdExposed as it slowed down my OP7 Pro a bit.
How do you find yourself with Samsung and system updates? Is it a stress to update and re-root?
tbh I don't really know about US versions, but please check the root thread and search through the comments, but when u have a carrier phone then it's hard to unlock, maybe pay for an unlock service..
updating and re-rooting is doable and not that complicated just with extra steps, u just patch the new update via magisk and use odin to do the rest, it depends just on the download speed of the new firmware update..
I use Greenify and Naptime just for some chinese apps that I use or shopping apps that keep running in the background and sending notifications. And with Tasker I can enable aggressive doze during sleep time. It's true that modern phones don't need dozing much, because Samsung overdoes it and sometimes it misses some notifications.