Well OK, but that's just the same thing with extra steps.

The point I'm making is that there are large cross-cutting concerns that shouldn't be sliced up by feature, but rather that the features should arise out of the composition of the cross-cutting concerns.

A single user story commonly requires the holy trinity of UI, 'business logic' and data storage, and my contention is that it's more efficient and robust to build those three layers out holistically rather than try to assemble them from the fragments required for all the user stories.

Our job as SWEs is to convert the vertical slice of functionality into something that fits well and robustly in the various technical layers that need to be touched.

The process that I outlined above explicitly creates the space for SWEs to consider the wider implications of the required changes in the architecture and make robust.

Part of that is understanding what the roadmap is and what is the product vision in the mid term, so that the tech layer can be built, step by step, towards what fits that vision.