This blog series aimed to address common misconceptions about NoSQL databases, specifically MongoDB, by examining the ranking of databases in Stack Overflow's Developer Survey and discussing the differences between buffering and caching in databases. Couchbase was found to have improved its reputation among developers, with a significant increase in survey rankings since 2020, and was identified as a viable alternative to MongoDB for projects requiring flexibility and SQL support. The series also highlighted the importance of considering memory usage in databases and introduced Couchbase's Magma storage engine, which can efficiently store large amounts of data while minimizing memory usage.