The blog post discusses how Airbnb smoothly migrated its iOS build system from Buck to Bazel while minimizing disruption to developer workflows. It details the approach taken for migrating the build configuration and IDE integration, highlighting the use of rules_shim to address differences between the two systems. The post also explains the process of unifying the genrule interface and replacing read_config with select. The migration to Bazel resulted in improved build times and collaboration across platforms. The post concludes by mentioning ongoing and future Bazel migrations at Airbnb and thanking the individuals involved in the successful transition.