The text discusses the challenges and limitations of using Memcache as a caching solution for large-scale applications, such as those at Snapdeal. The authors highlight issues with sharding, scaling, and data management, which can lead to problems like cache size, hardware costs, sharding complexity, failover, persistence, and development complications. In contrast, the Aerospike cluster provides automatic and immediate failover, replication of data, predictable performance, lower cost using SSDs, and simpler application development, making it a more attractive alternative for replacing or augmenting Memcache and relational databases.