Pixel inversion artifacts - why are they so common in 2020?

[overaller]

After having experienced major inversion artifacts on an AOC 242G / 242GU, I've been looking for a monitor without them. I had an opportunity to test a couple of widely various monitors at an electronic retailer. Refresh rate isn't as critical for me as any interference or image artifacts so I've tested both 60, 75 and 144hz panels.

All of the ones I've tested had some kind of inversion artifacts visible on different shades on the windows desktop, although some almost unnoticeable.
Having experienced a lot of different older monitors (think around 2003-07) in office settings and with personal use, none I could recall had anything similar, especially on the desktop or if they aren't pushed to their limits or by using inversion test patterns.

So even in the case I was extremely unlucky to have tested only "inversion-artifact-prone" monitors, or am extremely sensitive to this, my question is: Is the QA in recent years really that bad, did the industry-standard pixel inversion logic dramatically change or is there another explanation to this?

[Chief Blur Buster]

They are more common on fast-TN panels, especially cheaper brands.

Sometimes it afflicts more expensive models too. But they are found less often on certain 240Hz panels than 144Hz panels -- for example among TN, the ViewSonic XG2402 has less inversion artifacts.

The new 1ms IPS panels have a lack of inversion artifacts, in case you're interested. Have you considered a 240Hz+ IPS panel if you dislike inversion artifacts.