The thing about build tools and frameworks is that once you have tools for managing complexity then the penalty for complexity goes down and complexity explodes.

The apps I have seen built with all of these "modern" tools are much more complex and difficult to maintain than the apps I was seeing 10 years ago that were architected and managed by hand.

That is why many of the people using these tools are switching toolsets every 12 months because they can't maintain what they are creating and have to throw it away.