The free preview for Warp AI and Warp Drive, two major features of Warp's command line terminal, has been extended due to the delay in launching their self-service billing system. Thousands of developers are currently using these features, which were introduced earlier this year. The new billing system is expected to be available later this year, and users will receive an email notice with a generous window of time to decide whether they want to stay on the free plan or move to a paid team plan.