Ably's four pillars: no scale ceiling

Scalability is a crucial aspect for any system that needs to handle large or unpredictable workloads, and it's an essential element of modern cloud platforms. It refers to the ability of a system to change in size or scale to accommodate varying workloads. Ably has been designed around these principles, enabling it to handle vast realtime messaging workloads across multiple dimensions. The platform achieves scalability through horizontal scaling strategies, which involve having more components instead of larger ones. This approach supports the arbitrary and elastic scalability needed by platforms like Ably.