It's true that a developer can't be an expert in every aspect of the stack but that's where services like Datree or many of AWS' services for example come in, t

It's true that a developer can't be an expert in every aspect of the stack but that's where services like Datree or many of AWS' services for example come in, they bring the domain expertise and require the developer to only be familiar with the subject. The experts moved to be domain experts, working for the companies that develop the tools. You don't really need a resident storage expert in every company, since most companies have similar needs.