I think more than any physical mod, a trend that needs to die (which unfortunately never will) is the ego that some (feels like most) people get with cars, they exclusively want to be better than the next guy and flex the "money" they have and alot of people do it exclusively for social media. So often the only reason they have a car is for social media or they got it with dirty money etc.
Hot take, I would rather spend my time with nice, chill people that used auto-zone mods and understand that it doesn't make their car fast but that its all they can do right now, then spend it with some ego maniac who thinks their lamborghini makes them better than everyone else.
I guess the other thing that makes me sad is how many people are willing to go into heavy debt just to mod a car to look cool I know what this stuff costs cause I constantly look to see what I want to do in the future, it's why I feel like a fraud calling myself a "car person", when somebody sees my cars its just...a bone stock thunderbird and a bone stock Honda... when in reality, I prioritized maintenance and fixing it so that its safe, clean and reliable before I do any actual mods, its not visible but I did do the work myself.