Last time I used a library PC was when GHW Bush was in office. This was at the time when green screen monitors were the norm and media players were unheard of. Headphones weren’t an issue.
As far as personal listening, I use the cans exclusively. If I were to use the speakers with my H.H. Scott, I would blast out a wall if I chose full blast.
I use the cans with the Scott and my PC out of courtesy to my neighbors. Then again, I am the only user of said cans. If it came to publis cans, I totally agree with roossy. Those cans would never touch my head.