Doesn't fix its only 8 GB of VRAM, as the GPU part is not upgradable. Just get a PC and install SteamOS. One might call the 8 GB of VRAM VALVE's strategic mistake (look even the big reviewers on YouTube complain about the 8 GB of VRAM and they have millions of views).
The 8 GB of VRAM issue started like 4-5 years ago. Here is a more recent one: youtube.com/watch?v=ric7yb1VaoA ("Gaming Laptops are in Trouble - VRAM Testing w/ @Hardwareunboxed"). Indeed, the recent high memory price increase doesn't help this issue.
Despite its lofty price, Steam Machine performance is not as optimized as expected. To address high DDR5 RAM costs, Valve installed one 16 GB module. New benchmarks confirm that lacking dual-channel memory, apps and games produce significantly lower scores and frame rates.