Quoting the tl;dr in the linked article:
Samsung could be stepping up its game by offering seven years of major Android updates for the Galaxy S24 series, and the generous update policy might extend to other Galaxy flagships.
The Galaxy S24 series might also introduce charges for AI features like Live Translate and Pixel-like photo editing tools after 2025.
There’s speculation that users may need to sign in to their Samsung accounts for certain AI functionalities.
Are you from the US or the EU/elsewhere? I ask because the reason My S21 can’t be rooted is because the US/Hong Kong Models use Snapdragon CPUs. I don’t know if the same applies to the successors.
I am in US. I went back and found the article I had seen before -> https://www.xda-developers.com/how-to-unlock-bootloader-root-magisk-samsung-galaxy-s23/ I also checked your version and it seems that only the Exinos and Hong Kong Snapdragon versions can be rooted -> https://www.xda-developers.com/samsung-galaxy-s21-series-rooted-magisk/