This is a classic example of nVidia's ignorance and below belt blow to customers.
The GTX 1080 Ti, for instance, is still holding its own against many of afterward released GPUs. Sure, it lacks DLSS and ray tracing, but it remains a beast for 1080p and 1440p gaming.
I own EVGA 1080Ti FTW3, watercooled, OCed and it's truly amazing card.
It's unfair to phase out such an excellent piece of hardware just because newer graphics cards are underwhelming and have poor sales. If someone wants a real upgrade, they often have to look at the high-end, expensive options. Pascal was arguably the last truly great GPU architecture.