The founder of Warp discusses the reasons behind its requirement for login and closed-source nature. He explains that login provides a consistent experience across devices, enables secure collaboration features, and is necessary for metering usage in AI. Although he understands concerns about trusting a young startup with data, he emphasizes that Warp does not collect user data unless explicitly opted into by the user. The founder also addresses the suggestion of delayed-login, arguing that one-time login provides a better user experience. Regarding open source, the company is currently closed-source due to concerns about monetization and potential competition from other companies using their work. However, they are committed to eventually open-sourcing Warp's Rust-based UI framework and will open source everything if the company ceases to exist.