https://techcrunch.com/2021/10/11/learn-why-in-space-propulsion-systems-are-essential-for-a-sustainable-space-economy-at-tc-sessions-space-2021/

In-space propulsion systems are the backbone of space exploration, and they’re becoming even more important as companies and government agencies deploy ever-more low-earth orbit (LEO) satellite constellations. SpaceX alone hopes to deploy 42,000 Starlink satellites over the next several decades.

Improving a satellite’s thruster power and maneuverability can play a vital role in space sustainability. How? Developing and testing new technologies — like electronic propulsion systems (EPS) — can ultimately help better smallsats achieve their correct orbit, avoid collisions with space junk and then de-orbit safely when they become non-operational.