Bingo!
I've actually gotten to the point that I check my bag fairly regularly. I have enough status on Delta, so I can check it for free. I don't have to lug it around all through the airport, don't have to worry about finding a spot in the overhead (though I usually book exit row, which is usually wide open when I board), and I rarely have to wait more than 5 minutes at the baggage claim on the way out, which honestly, if I weren't standing in line there, I would be standing in line at the rental car desk or Uber curb. Added bonus, I can pack full-sized toothpaste!
As a pseudo Process Engineer, when I'm sitting on the plane waiting for the line of people trying to squeeze one last bag into the overhead bin and I look out and see all the rampers standing around twiddling their thumbs while the APU just sits and hums along burning fuel, I often wonder if the true cost-benefit of charging for checked baggage is really making the airlines any more money. It definitely increases board/deboard times, which reduces gate turn times, which increases wasted labor for rampers standing around doing nothing. Not to mention the general passenger 'experience' of stressing about baggage. It definitely has to be a net-loss to charge for checked baggage.