What are the challenges of elastic stack?

Can you elaborate on the challenges that organizations often face when implementing and utilizing the Elastic Stack? Are there any difficulties in integrating its various components such as Elasticsearch, Logstash, and Kibana? Do the complexities of data processing and analysis pose any hurdles? Additionally, how do scalability and cost considerations factor into the decision-making process? Are there any security concerns or limitations that need to be addressed? It would be helpful to understand the full scope of challenges associated with adopting and maintaining this technology stack.