Pushups are underrated in my opinion. There are so many variations.
im not knocking push ups or any bodyweight exercises cause i think they are good, i just dont see why a person would pay a gym membership and drive to the gym when they could do them things at home. if im paying for a gym membership and taking the time driving there im going to use every possible peice of equipment i can, providing its a good peice. if i was that dude id just buy 1 of those pull up-dip combo peices you can put in the basement or garage, there only about 125$ or so and u can do push ups,chins,abs,dips ect