A word to the wise: The default setting on the Model X for automatically lowering suspension to low is ALWAYS. I highly recommend setting this to either NEVER, or some high speed that would limit the vehicle's time spent in low. I wish someone had told me that the car putting itself in low by default so often would result in $1100 in two new tires before I even hit the 10K mile mark. They should change the default setting to improve this situation for future owners.
This is true in theory, BUT in practice it is highly dependent on your car's specific factory camber settings (as they have a tolerance and possibly quite a wide tolerance!). I've read of cars run on low setting that have actually worn out the OUTSIDE of the tyre. In that case running standard ride height would have been even worse.
As a practical step, all you can do as an owner is take regular tread depth measurements across all your tyres and take action sooner rather than later if you see uneven wear. If you see early signs of uneven wear, you can either adjust your ride height to compensate, adjust tyre pressures if out of spec and in more extreme cases get onto Tesla to re-set your camber angles.
I think the reason the cars now come from the factory with a default low setting is because of driveshaft issues at higher ride heights (google the acceleration judder issues). I prefer the low setting for most road use because of the handling advantage and if I see uneven wear I'm going to ask the SC to adjust my camber angles to compensate for the lower ride height (presuming there is enough adjustment range in the hardware).
Edit: Just checked my tyre wear at 3000 miles (mostly on low setting)
Front left: 7.5 / 8.0 / 8.0 / 7.5 (inside to outside)
Front right: 7.8 / 8.0 / 7.8 / 7.8
Rear left: 7.5 / 7.2 / 7.2 / 7.5 (inside to outside) - original tyre was replaced at around 500 miles (puncture)
Rear right: 7.0 / 7.0 / 6.7 / 6.5
Looks pretty reasonable to me, so I'm going to continue running on the low suspension setting.