I used to live at a place where the airport was serviced exclusively by the MD-80. That is possibly the worst aircraft I've ever experienced. The noise, the vibration, is just awful. You can't even hear the flight attendant ask if you would like something to drink.

Delta kept that plane around in passenger service far, far too long. It should have been banned from the skies long ago.

I rejoiced when I found out the MD-80 was retired due to reduced demand from COVID. Apparently some South American carriers still use it for passenger service, so I guess I'll just have to wait a few more decades before I can be fully safe from having to experience that misery.