Feature flags are widely used for managing releases, and many companies have built their own DIY solutions. However, using a platform like LaunchDarkly can offer several advantages over in-house systems. These include consistent functionality across platforms, near-instant responses and updates, advanced targeting capabilities, effective access management, and empowering non-engineers to manage feature flags. Migrating from an in-house system to LaunchDarkly can be done incrementally and with minimal disruption.