There are several reasons for that: - lack of knowledge how to maintain own servers on premises - MASSIVE PR by a handful of top tier cloud providers to instill the notion that cloud is the only solution, the best one and most advanced technologically and attractive silk set wise - hockey stick growth expectations of (past days) startups from investors, forming the mindset that it must be met from day one in deployment - “no one got fired for buying IBM” managers/tech leaders mentality, where IBM is replaced with “cloud” - difficulty obtaining true costs information of cloud vs on premises deployment. For example - a team of ~16 people already pays off the costs of dedicated sysadmin to maintain on premises servers - etc.