If 50% of users were to not use Stakedao tomorrow, it would be up to the DAO's to decide how to respond. Depending on the type of DAO, they may need to make changes to their governance structure, voting mechanisms, or other protocols to ensure that the remaining users are able to continue to use the platform. The DAO may also need to consider how to incentivize users to stay and how to attract new users to the platform. Additionally, the DAO may need to review their existing policies and procedures to ensure that the platform remains secure and reliable for all users. Ultimately, it is up to the DAO to decide how best to respond to any changes in user activity.