It is scalable. But that depends on what model you are using.
Palo Alto Networks PA-Series is praised for stability, robustness, and reliable performance with minimal downtime. It features security capabilities like App-ID, web filtering, and WildFire, enhancing threat detection and prevention. It offers extensive logging tools, seamless integration with other products, scalability, and robust customer support. However, there are issues with TAC support, pricing, data security for remote work, the application portal, and a suggestion to integrate AI for security purposes.