Iāve been thinking a lot about related things recently. Iām working on a piece that has opportunities to use all three pedals, and right from the beginning there are real questions that I found myself asking about how to use the sustain pedal. 
You can see that the composer puts an indication of ānon legatoā while at the same time indicating extensive use of the pedal.
In recordings of this piece, pianists do very different things with this, and initially I just kind of took the non legato indication as permission not to connect all the notes physically. But the ānon legatoāindication raised real questions about what the intended effect should be. Also, on my piano, I get a very very wet sound with the sustain pedal, while my teacherās piano sounds considerably dryer with the pedal fully engaged. We talked about different options ā including partial pedaling and flutter pedaling for this section. On my teacherās piano, I tend not to think about this too much and just use the pedal, because I still end up with a relatively dry sound. However, on my home piano Iāve still been experimenting with this quite a bit. I still havenāt made a final decision about what I want to do.
Now the una corda pedalā¦
Thereās this section marked una corda, but the composer never indicates where to take the pedal off. Itās also the only place where its use is indicated. So Iāve been playing around with where to take the pedal off, as well as other places in the piece where it might be effective to use the una corda pedal, as it seems strange to me to use it just in this one place. On my teacherās piano, the change in tone is pretty subtle, so I just use it in this one spot and then forget about it. But on my piano, I get a pretty significant change in tone, and so it feels like a much bigger decision about where and how much to use it.

Then thereās the sostenuto, which I havenāt ever used before. Thereās an extended section that starts like this:

When I started working on this, I took the staccato markings of the outer voices to be more an indication of the lightness that these note. By my teacher suggested using the sostenuto to connect the chords, and I am enjoying the effect. Anyways, pedaling definitely has lots of subtleties and complexities, which are fun to explore!