Frontend is inherently complex and becoming more complex because we build more dynamic web apps. PM and designers don't know what works and keep changing the product until they get something acceptable, which will also mean much more moving parts for developers until the product matures.

The complexity will stay and get bigger, we need to a way to control it and be able handle it.

The first step is to abstract frontend development (be it web, mobile, desktop or even VR) into concepts then introduce a system to build apps with these concepts.