Even the Quadro P5000 MXM in my Dell Precision turdbook has 16GB of vRAM. It is inexcusable that 8GB GPU options exist today. That should only be on the cheapest and lowest tier garbage-class products that are just one step up from integrated graphics.
Nothing new is built to last the test of time or deliver maximum performance. Everything is designed to fail, and deliver structured performance limitations, to ensure a never-ending flow of cash.
It is remarkably similar to the pharmaceutical industry and practice of medicine. They do not make money on healthy people or cures. Keeping people on meds forever, and follow up doctor visits to renew prescriptions, and creating new medical problems from prolonged consumption of chemicals that require more meds and more medical care is the gift that keeps on giving. They don't want anyone to be healthy because it is bad for business.
PC and electronics hardware companies do not want to manufacture and sell durable consumer products that perform well. They want to sell garbage with a limited lifespan so they can collect more money on upgrades and product refreshes to replace the last generation of trash they sold consumers.
Live to pay, pay to live. Just like the old bumper sticker... Ass, gas or grass... nobody rides for free.