Everybody can go to a dealership lot and look for a whip antenna, they don't need to listen to me. Everybody can sit in a new car without a stupid steel antenna sticking in the air and hear their local radio station just fine and know exactly what the answer is. I'm not asking anybody to listen to a word I've said, they can see with their own eyes and hear with their ears. If the new cars without that steel whip suck than I'm full of shit. No big deal. No crazy off the wall suggestions, just what you can go see for yourselves.
Sorry but your statement is incorrect. The sharkfin antenna that you see on vehicles is a multi ban antenna that is primarily used for your GPS, Bluetooth, Onstar and Digital radio. There are usually 3 connections coming out of the shark fin
1 goes to the digital radio receiver (xm)
1 goes to theOnStar module/GPS
1 goes to the HMI/VCIM
This is pretty much std on all GM vehicles depending on which RPO codes (options) the vehicle has. Other vehicle manufacturers are similar but may have a different layout.
The reason you don't see a standard metal antenna on vehicles is because the AM/FM antenna is run through the glass on the majority of current vehicles.
GM passenger cars run the antenna though the rear glass. GM SUV's usually run the antenna through the right rear quarter glass.
They also use a radio antenna amplifier to improve reception. No it's not like that crappy 20.00 one you see advertised on amazon or crutchfield.
GM pickup trucks still use your standard run of the mill antenna, along with 90% of other vehicle manufacturers. The ones that don't usually run it through the front windshield.
As for the aftermarket Sharkfin, they pretty much suck. They also usually recommend the use of an FM signal booster for obvious reasons.
I've installed them on street rods, muscle cars and Jap cars, with less than stellar results.