The text discusses the challenges faced by EdTech applications in delivering realtime experiences and maintaining high uptime. It emphasizes the importance of dependable infrastructure that meets four key pillars: predictable performance, integrity of data, scalability and elasticity, and high availability of service. These pillars are crucial for ensuring seamless user experiences and handling short-term spikes in demand as well as long-term growth. The text also highlights the benefits of using cloud computing to support realtime technology in EdTech platforms, allowing them to be more agile and responsive. Ably is mentioned as an enterprise-ready realtime communication platform that can help developers build dependable realtime applications with ease.