Last I checked AWS still sells EC2 instances using 2018 era GPUs. Most people underestimate just how much long tail demand there is and how long these cards last, despite the higher power consumption.
I wouldn't be surprised if RAM cartel or nvidia will attempt something like that, plus nvidia already talks about license-locking GPUs.
Also, again, IIRC, IBM hardware already works this way. There are almost no aftermarket when I last checked for them because it's all locked up and useless.