Fwiw, the front tires normally get almost all the wear on the outside edges.
If you haven't rotated the tires for 10,000 miles, and you're showing some wear on the outside edges, it's probably normal and could have been avoided with a tire rotation... I have been rotating the tires on all my cars every 5,000 miles, and never have had premature wearing on the outside edges.
If you have a lot of wear on the outside edges of the front tires, then you're algnment is probably off, or you have worn out suspension components, like tie rod ends, etc.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".