It's all nonsense. There is no market for mobile cpu / gpu chips, which means there are no adequate market prices. So it's all pointless.
It is much more important to make a laptop with a 7x45 AMD series, which has 28 pci-e 5.0 links and 16 of which are free with an eGPU x16 pci-e 4.0 link. You need an eGPU based on at least x16 pci-e 4.0 (x8 pci-e 5.0), 4xUSB40 take only 4 pci-e 5.0 links from this pool. But NO laptop manufacturer has yet made a solution with 4xUSB40 based on the AMD 45 series, although it easily allows it!
It is elementary to develop a riser for desktop GPUs with a link using 4xUSB40 (x16 pci-e 4.0) aggregation. And then there will be practically no difference in the performance of the desktop 4090 on such laptops compared to desktops. This is a 30% jump in 3D performance on laptops.
In addition, desktop cards even at the level of 4090 make 3-4 times less noise than the total cooling of mobile chips! It also provides much better performance for mobile processors. you don't have to cool the discrete card!
From the point of view of ecology - there are hundreds of millions of old laptops on the planet, with well-preserved cases - what prevents capitalists from setting up the production of motherboards and components that exactly fit their dimensions and port layout, but in new, more productive versions?
I myself have an old Thinkbook T class lying around in perfect condition, with a burned-out motherboard due to Lenovo's fault, and this model was very popular and is often found at flea markets. I would be very happy if Lenovo released a motherboard that exactly matches the expansion ports, but with modern hardware for this case, as well as support for modern screen panels. The cooling system, if you install the latest AMD series, will easily cope if you do not chase top performance.
Now imagine a market of hundreds of millions of old and in mint condition laptop cases that could be upgraded and thereby drastically reduce the burden on the planet's ecology.