[aidenn0]

A couple of comments:

> But any instrument that’s not the piano or guitar can actually make micro-adjustments while playing a song

You can make micro adjustments on a guitar, but only to be sharper[1]

> But for now, one obvious advantage is that this allows us to do “real” glissandos, where the pitch smoothly transitions from one note to another

For a famous example of a "fake" glissando, the opening clarinet solo of Rhapsody in Blue, which, as typically performed, is rather smooth from D5 to C6[2]

1: https://en.wikipedia.org/wiki/String_bending

2: https://www.youtube.com/watch?v=ykFWUEHhkMw

[mcdeltat]

You can make adjustments on a guitar to make a note flatter by pushing the neck/headstock forward, relaxing the strings slightly