Or maybe it's more accurate to say you can learn all sorts of new stuff month by month if you just stay alert.
For instance, I learned that a cellist can improvise a set of solos that use just harmonics.
That's pretty awesome!
I knew that it was possible to create a lydian canon by retuning a guitar to raised F (6) and then exploiting the fact that the guitar and viola have an overlapping set of natural harmonics to make a sweet contrapuntal waltz in C lydian using harmonics alone ... but that a cellist can improvise a solo just using harmonics was something I didn't know until today.
Again, that's pretty awesome!
I may have to write another sonata for cello and guitar just to make use of this new knowledge.