What are the disadvantages of CloudSim?

Could you elaborate on the potential drawbacks of utilizing CloudSim in cloud computing simulations? Are there any limitations in its scalability, accuracy, or flexibility that might hinder its effectiveness in simulating complex cloud environments? Additionally, are there any security concerns or privacy issues that users should be aware of when employing CloudSim for their simulations? Understanding these disadvantages can help users make more informed decisions about whether CloudSim is the right tool for their needs.