They went out of style as companies poured marketing into SUVs and trucks which have higher profit margins (I regularly see $70-90k pickup trucks used for office commutes!), all boosted by unusually low interest rates and 5+ year loans.

Then at the start of the pandemic, the car manufacturers slashed their orders for microprocessors in anticipation of a depression. The fabs sold their capacity to other customers which meant that when car demand didn’t crater as expected there was a massive shortage, and the car companies prioritized what chips they could get to the highest profit models.