What are the disadvantages of Stellar?

Could you elaborate on the potential drawbacks of utilizing Stellar as a platform for cryptocurrency transactions? Are there any notable security concerns or scalability issues that investors should be aware of? Additionally, how does Stellar's adoption rate compare to other popular blockchain networks, and does this impact its overall appeal to users and businesses? Lastly, are there any specific use cases or industries where Stellar may not be the most suitable option, and why is that the case?