git worktrees optimize how data is shared across multiple directories. So, you’re not cloning and duplicating a bunch of code on your machine and just referencing data from the original .git folder.

The only downsides I’ve seen:

1. For JS projects at least, you still need to npm install or yarn install for all packages. This can take a bit of time.

2. Potentially breaks if you have bespoke monorepo tooling that your infra team won’t accept updates for, why is this example so specific, I don’t know just accept my PR please. But I digress.