Sorry, but ever more regulation and requirements as well as consumer demand make that a pipe dream.
You get a lot more for your money than you used to.
One of the cheapest cars in 1970 was the VW Beetle, its base MSRP was $1,839... Adjusted for inflation that’s $12,137.97 in todays dollars
The Nissan Versa is at 13,255 is the cheapest care available in the US today... and no one would argue that the Nissan Versa offers far more value for the money than the base VW Bug, so you definitely get more for your money.. (this is true across all autos honestly)
So, true cost is declining, but you are getting so much more for the money that the overall cost is not going to drop anytime soon. I have no doubt if cars came in an absolute base model anymore.. you could get cheaper, but no one buys them so they don’t make them.
I don't think that having a tire pressure indicator, that when it failed cost me $400 to fix, offers me any value. In fact it cost me the $400 to fix and the hundreds to install and equip in the new vehicle. Honestly, there are dozens of examples of this. Cars are commoddoties and if not for the insane regulations (and union wages in some states) one could easily offer a base BMW for $25,000 and a Jeep Wrangler for $20,000 or less.