What are the disadvantages of Kaspa?

Could you please elaborate on the disadvantages of Kaspa? I've heard about its scalability and security features, but I'm curious about any potential downsides. For instance, is there a concern about the network's decentralization, given its mining mechanisms? Also, how does Kaspa fare in terms of transaction fees and speed compared to other cryptocurrencies? Additionally, are there any known vulnerabilities or attack vectors that Kaspa might be susceptible to? I'd like to understand these aspects better before making any decisions.