As the title says lets talk about the sys requirements,especially the ram memory usage in game.While i was playing the game i mesured maximum of 7 GB RAM usage with the amd adrenalin software while playing on 4k resolution with ultra textures and 12 GB usage of VRAM from the GPU.So you absolutlely don’t need that 32 GB of Ram from the official system requirements of the game upon release,that is an overkill,all you need is 16 gb of Ram and GPU with 12+ gb of VRAM there is no game on the market that uses more than 10 gb of ram but they all use 10+ GB of Vram so i would say 8 GB of Ram is the bare minimum while the recommended Ram is 16 GB.Blizzard team should change this information that you need 32 GB to play on 4k Ultra settings.You gonna need more than 16 GB of Ram for the game if while playing the game you have opened a media player to listen music,you have opened a browser like Google Chrome that eats up to 10 GB of Ram and Photoshop,only then you gonna need 32 GB RAM,other than that the game does not uses more than 7 GB of RAM System Memory.
Edit
I just found out that the game uses max of just 5 GB of system ram not 7 GB because 5 GB of System ram are compressed by the Windows for other applications that means they are stored as reserve for other apps from the Windows in order so that they can work correctly,so my game was showing 10 GB of usage,if you split that in half the game uses just 5 GB of memory so like i said 16 GB is plenty for this game.