> since public cloud became very popular, the profile of infrastructure programmers changed. A lot of knowledge necessary to run own infrastructure disappeared

> since public cloud became very popular, the profile of infrastructure programmers changed. A lot of knowledge necessary to run own infrastructure disappeared, being replaced by the knowledge of how to operate the service. It was ever thus. Previously it was CISCO Solution Specialists and HP/UX Most Valuable Engineers and the like, and all the knowledge beyond the basics was completely tied to the vendor. In enterprise IT, it's still like that for Microsoft.