If nothing else this should do quite a lot to reduce carbon emissions, and I'm only half joking here. Now if we could change fashion from fast fashion to focus on durability that would be an even bigger change. And it is not completely unrealistic: While I have no hard and fast rule to go by on how exactly this could turn out I do sense a huge opportunity for one or more smaller brands to more or less utterly disrupt…
This doesn't solve anything if the parts you replace are then thrown in the landfill. All you've done is spent a lot of resources and energy to turn around and throw stuff away anyways.
It also matters a lot if one product end up at the landfill after 10 years or if one product end up at the landfill every year, resulting in ten products at the landfill during the same period.