I often wonder if PPP comparisons are relevant anymore. What is the significance that you could buy 10 blenders in 2022 with $1 40 years ago in 1982? I guess

I often wonder if PPP comparisons are relevant anymore. What is the significance that you could buy 10 blenders in 2022 with $1 40 years ago in 1982? I guess its meaningful because you didn't have the buy a new blender every few years. But what happens to all of the old blenders being replaced?