I got over 1000 miles on a pair of New Balance shoes at 270 lbs. Some shoes have lasted almost as long. Others have squished down after just a few hundred miles. Most of my miles are off-road, if I put in a lot of miles on the road, the outside heel wears off where I scuff them.

Have neutral feet but wore heavy motion-control shoes for most of my 30+ years running because they lasted longer, and not much else available in size 16. My feet shrunk about 5 years ago and I found I could wear a smaller size and tried Hoka and that's what I've been wearing almost exclusively the last 5 years. The Hoka midsoles seem to last forever. Unfortunately, the uppers tend to fall apart quickly. Only one pair, some Bondi, lasted long enough that the midsole squished down to the outside enough that I gave up on them after 700+ miles.

That's a long-winded way to say that I'm not sure that weight is the major factor in shoe life.