For me, replacing tail lights had absolutely nothing to do with the cost of the bulb.
It had absolutely everything to due with whining to the cops and my insurance company....
"But I DO a walk around check once a week to make sure all lights are working".
In my not so humble opinion the 3157 light bulb is a piece of SNOT compared to the old-style 1157. I had 1157's last for years - not so with the 3156 or 3157.
I almost got smacked GOOD a couple of years ago and it would have been my fault.
And I got damned tired of pulling lenses off and doing contortion acts to change the push-button 3157 bulbs in preventative ritual changing.
Maybe other people have more patience or are braver than I am. The 10-wheel box Kenworth reefer truck missed me by inches thanks to an alert driver. I felt like an utter fool.
I need to install those side marker LED turn signal dime-size sealed lamps.