Musical Instruments
Back in the days of Korean MMOs such as Mabinogi and Archeage I remember they had actual music sheets where people with musical talent could actually write music to be saved and automatically played on instruments. It was server side so there was no lag to the tune no matter where you were in the world.
It was one of the features I found enjoyable when just relaxing at a town square and gave a better incentive to actually pay for an instrument. In fact, I’d happily buy an instrument if there was a similar item/ function in this game.
Multiple Class Disorder