Managing sites at scale is not an easy task, and the complexities and issues only grow as the project and its number of sites grows. Traditional Drupal multisite solved one of those problems: creating several sites in an easy way. However that was not necessarily built with things in mind like scaling, performance, security or even maintainability (hence the high costs of maintaining big factories of sites, sounds familiar?). Let's have a discussion with different agencies, from developers to architects, PMs and agencies owners, at how they approach deploying Drupal at scale, and what alternatives are there, if any, at solving the multisite problem