Replit's new "Projects" feature allows teams to collaborate by maintaining multiple versions of their codebase and easily merging changes together, while also providing isolated environments for individual team members to work on their ideas without affecting the main codebase. This feature aims to simplify collaboration processes by reducing the need for complicated environment setups and slow review processes, making it easier for teams to share projects across departments and contribute to each other's codebases. With Projects, users can create isolated working environments, make changes, preview what changed, and merge those changes back into the main version with a few clicks, all while leveraging popular version control software like git.