I have an iPad 9th generation here, from 2021, and it appears to be at the end of its life.

I expected it to last a little longer, despite the cheap price of around $350 in 2022.

After the Liquid Glass update it became so sluggish that I had to turn off animations in the Accessibility settings. And it still is not enjoyable.

iPad Pro (4th generation) 2020 here. Life was good then updated OS with liquid glass. Big mistake.