The laptop version of the Nvidia GeForce RTX 4090 scored 201,290 points on Geekbench's OpenCL database. It features 16 GB of VRAM, 9,738 CUDA cores and a boost clock of 2,030 MHz. Nvidia plans to unveil it at CES 2023. https://www.notebookcheck.net/Nvidia-GeForce-RTX-4090-laptop-graphics-card-trades-blows-with-the-GeForce-RTX-3090-on-Geekbench.677473.0.html
Miserable RAM. Does Nvidia thinks that 4090 users only play games?
I think you mean VRAM.
Is 16GB not enough for you and how much do you need? Is GDDR6 too slow for you? I like it because it creates less heat so less noise.
If these are important for you, how about a desktop 4090 when the adapter will have been redesigned safe?