What are the disadvantages of helium network?

Could you please elaborate on the potential drawbacks of the helium network? I'm interested in understanding the limitations or challenges that might arise from its usage. Could there be issues with scalability, security, or perhaps the costs associated with maintaining and operating the network? Additionally, are there any concerns surrounding the centralization of the network or its dependency on specific hardware? It would be helpful to gain a comprehensive view of the helium network's disadvantages to make informed decisions about its adoption.