Platform-as-a-Service (PaaS) simplifies software development by offering ready-to-use application infrastructure, allowing developers to focus on building applications without worrying about the underlying environment. Originally popularized by Heroku, PaaS has evolved to include major offerings such as OpenShift and Cloud Foundry, providing a more structured and opinionated approach to software deployment. The integration of PaaS with tools like Harness enhances Continuous Delivery by automating deployment and rollback processes, making it easier to manage applications across hybrid and multi-cloud environments. However, the rise of Kubernetes as a dominant orchestration platform has challenged traditional PaaS offerings by providing a more flexible and scalable solution for cloud-native applications. PaaS vendors have begun to incorporate Kubernetes to stay competitive, with companies like Red Hat's OpenShift embracing it as an orchestrator. Despite the competition, PaaS still offers unique advantages in terms of portability and developer experience, with Harness supporting seamless integration to maximize technology investments.