Saiu um artigo recentemente na developerWorks da IBM falando sobre as idéias do Rails que o Ruby prega e que está tornando a tendência daqui pra frente, principalmente na comunidade Java, que deveria se atentar pra isso, e diminuir a tamanha complexidade. 
Ruby on Rails seems to be a lightning rod for controversy. At the heart of most of the controversy lies amazing productivity claims. Crossing Borders author Bruce Tate has come to understand that Rails isn’t a better hammer; it’s a different kind of tool. This article explores the compromises and design decisions that went into making Rails so productive within its niche. Then it looks at Rails-inspired ideas that should get more attention within the Java™ community.
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