I've been meaning to go through the Steam hardware survey data by hand for a while, and I finally have results for you. I categorized the listed cards as follows:
Old (31%): GEForce 10 series or earlier, or equivalent AMD or Intel GPUs.
Modern mid-range (43%): GEForce 2000 series, or any GEForce card ending in "50" or "60", or equivalent GPUs.
High-end (26%): GEForce 3070 and above, or equivalent GPUs.

Observations:
There's a lot of holdouts using GPUs that are 10+ years old.
Most of the people who have upgraded since then have been pushed into the mid-range, where they don't have much more power than what a GEForce 1080 TI provides.
Amazingly, more people are using 10+ year old GPUs than are using modern high-end cards.
What do you think of this? Did I make any mistakes? I first noticed this phenomenon about six months ago, but this is my first time working out the exact numbers.
Here is the Excel file so you can double-check my work:
https://www.leadwerks.com/files/SteamHardwareJune2026.zip