PubNub is focused on enhancing its real-time communication infrastructure by leveraging Rust to improve scalability and adaptability. The company is expanding its Channel Group infrastructure to accommodate a larger volume of channels, aiming to increase the number of supported channels per group from 2,000 to 5,000. This expansion involves replacing existing Python and Cassandra components with Rust and DynamoDB, respectively, to ensure high performance and reliability. The transition is part of a broader strategy to manage operational complexities and optimize data replication while maintaining efficient message delivery. The company is also exploring ways to handle large-scale subscriptions and enhance data management through a globally proactive-replicated message bus. Additionally, PubNub is preparing to introduce Channel Group events similar to Presence API events to improve data management and provide users with better control. The upgrade, anticipated to be completed this year, reflects PubNub's commitment to providing a seamless, scalable, and efficient service.