...console optimisations also translate into PC optimisations. The only downside is that developers don't have to care for things like 64GiB of RAM or 24GiB of VRAM like the 3090 has.
That's somewhat my point, I'm pretty sure PC users would like to see some dedicated PC optimization that can take advantage of the superior hardware.
I'm nowhere near using a high end rig, but still potent enough to have some fun, unfortunately I'm still experiencing the occasional performance hiccup as GPU utilization drops below 70% and stays there for a little while. Pretty sure it's not an issue with the hardware though, being unable to reproduce this behavior in other games.
That's where dedicated PC optimization would come in handy, instead of whatever advantage or disadvantage the next gen update may or may not bring to the PC as a side effect.
Overall it seems like PC gets the lesser child treatment. The main focus seems to be on consoles, while PC gets affected in whatever way the console optimizations went.
Personally, I think the additional expansions you mentioned would rather consume more resources that could have gone towards anything PC related.
That being said I'm not really complaining about the PC version of the game, it's just that slowly but steadily every PC alternative gets optimized to the point where it starts to feel slightly unfair.