Designing monolithic infrastructures is a common mistake in large projects. However, more often than not, these infrastructures are too generic, make false assumptions or are simply delivered too late for feature developers to use, becoming "white elephants". This presentation is a case study of the work done by my team to deliver Live Merging of Snapshots oVirt from the initial steps in oVirt 3.1.0 to the full delivery in 3.5.0, and how good design can be feature-driven, building infra-structures step by step, while gaining small wins during the process.