I expect Mark Cerny do a similar job on PS5 and have everything balanced that all parts complement, so if it can't do more is not because of CPU/GPU/RAM alone but all together.
If from your expectation of the system going from 16 to 24 is already a lot and 32 is pointless I see very little reason to doubt.
Oh, don't misunderstand me, though. I certainly expect excellent, beefy machines (for the time)! I also totally understand you guys' excitement (new consoles on the horizon leaves a good feeling for a gamer like very few things). I'm really trying to just help y'all keep expectations in check, because I have a tad of extended knowledge in the field and don't want to see hopes crushed simply because they expected too much.
So, I think the PS5 will launch with at least 16GB of RAM, a customized and powerful Navi GPU, at least a 2TB HDD, and Zen 2. Y'all will see how that will fair in the hands of devs like Guerilla Games, Naughty Dog, and Santa Monica. Trust me, you'll forget that there isn't 32GB of G6 in the system. ;)