You'll need the Shoe of Theseus if your looking for one that lasts 30 years.
It'll have to be made from full grain leather and have a welt. This will allow a cobbler to replace components.
Modern(athletic not fashion) sneakers are made to be worn for 300-500 miles. That is the life of the glues, foams and synthetic materials.
I know there have been brands in the past that have made sneakers this way but they are fashion/luxury/lifestyle versions. Not sneakers that are actually made for exercise.
Edit: I found these. They might be the ones I remember reading about.
https://www.feitdirect.com/products/classic-high-tan
That brand also makes these but they might not be welted.