Last week I put a winter tire package on my kid's RAV4 for the first time. The vehicle has 28k miles on it, so the OEM Michelin Lattitude Tour HP have all those miles. We bought the car with 20k even on it.
All 4 tires have decent tread remaining, so no question that they would make 45k plus at this rate. But, the inner line is most definitely worn more than the outer by at least 1/32. No odd feathering of the blocks and no unusual road noise, so I don't see a huge problem at this point.
The car is going in for an oil change next week, and I've asked that they use the receiving bay quick alignment checker to give me a printout of the current numbers. I suspect that I'll see a slight negative camber to have worn all 4 so evenly. The question is whether it's considered to be within spec or not, and whether I should take any action at this point.
Oh, and to join in the above discussion, I don't expect a whole lot from original equipment rubber. I'm glad that Toyota selected Michelin as an OE supplier, but the Lattitude is not one of their tires that I would buy were it my money. And if you do your research, you might find that the OE-Spec 'Lattitude' purchased in volume isn't exactly the same 'Lattitude' you'd buy from a Michelin dealer! It might be missing a ply, or there might be a materials change. Nothing at all against Michelin implied here, and I haven't investigated the Lattitude tire specifically. But mods to meet a cost & performance objective is an industry norm. The word 'tuning' is sometimes used, although cost savings might be closer to the truth. Same goes for batteries....