The constellation is self cleaning to some large degree because of their relatively low orbits. Satellites that die on final orbit have ~5 years before they've

The constellation is self cleaning to some large degree because of their relatively low orbits. Satellites that die on final orbit have ~5 years before they've reentered on their own, and before they orbit raise right after launch, it can be as low as a couple weeks. These orbits were an intentional choice by SpaceX. One of intentional effects benefits is to not contribute to space junk concerns.