What is the Disadvantage of using this approach?

Everything comes with its own merits and demerits depending on the task performed. Coming to the server-less approach, this fact is applicable here as well. In a few cases, their upper limit is strictly on the vendor control in this approach, and this means more downtime and thus more losses. The loss of system functionality and the system’s limits are other issues. Also to mention, no dedicated hardware is available for the server-less approach. Thus performance and security have become essential challenges at various stages. Sometimes errors by the customer can also give rise to the problems. New deployments, as well as the monitoring tools, have become the sole choice when the matter is of converting to functions of Google Cloud.