Quest3. It took a year of occasional use for it to develop a problem with the left thumbstick.

So i took it apart and gave it the same treatment. There are a few differences though.

Quest3's controllers are much simpler in design, and are significantly easier to take apart, and MUCH easier to hack. This is mostly thanks to how easy it is to screw just 3 parts together to have an almost fully working controller with all the electronics exposed. Thanks, Oculus Meta!

Now, there is no dedicated switch ic that turns on the power to the thumbstick, its power pin is connected to just an output pin of a microcontroller ("uc"). The uc periodically pulls it high for something like 70 microseconds to read the state of the thumbstick.

Now, the supply voltage is only 2V, so i can't use the same opamp in the same manner anymore (OPA2344 needs at least 2.5V to work). But it turns out, there is 3.3V rail test pad available right next to the thumbstick connector. And that 3.3V rail is only active when the controller is awake. How nice! So i just powered the opamp from that.

I have also rewired the power source for the thumbstick to the enable pin for that same 3.3V rail, so the thumbstick is now powered continuously. That should make the circuit even more resistant to the loss of wiper contact. 

(that long vertical wire is the new "power" for the thumbstick)

I have also taken apart the thumbstick potentiometer again, to check how much wear there is. I found it to be in a very good state, the potentiometer surfaces have basically no visible wear, and should last for much more. I think the problem is that there was a little bit of oil on them, and that oil probably has attracted some insulating dust. Sorry, forgot to take photos...