You'll have to spend change at some point, and at that point, you'll probably want to consolidate outputs. So what do you do? You mix.

Assume you make 500,000 sat change every month. Consolidate outputs you're confident of revealing common ownership, and send them over to a mixing-only Sparrow wallet. From that point on, you can select any of those spent change and use them in several coinjoins. The alternative, probably more expensive approach is to send change to a mixer.