What are the disadvantages of using Lambda?

As a practitioner in the field of finance and cryptocurrency, I often come across various tools and technologies that can enhance operational efficiency. However, one such tool that has gained popularity in recent times is AWS Lambda. While it offers numerous advantages, I'm curious to know what are the potential disadvantages of using Lambda? Are there any limitations in terms of scalability, cost, or security that businesses should be aware of? Additionally, how does the lack of control over the underlying infrastructure impact the overall performance and reliability of Lambda-based applications? Understanding these drawbacks will help me make informed decisions when recommending this technology to my clients.