"1070s or 1070 TIs because GPUs have been severely overpriced for too long" ... ."

1070ti launch MSRP was $450 ish. 5070 could be had in the last year for 5xx-6xx range easily.

All things considered - (inflation being about 30%~ (guess)) between these two timelines. You are looking at 300% performance difference at a cost dollar for dollar that is cheaper then when they purchased their cards.

Might be a bit of a stretch blaming it on "severely overpriced for too long..."