Multi-tier is different compared to say hex or clean, in that depedencies for edges of the system depend on interfaces in the "Core". Tradtional mulit-tier the

Multi-tier is different compared to say hex or clean, in that depedencies for edges of the system depend on interfaces in the "Core". Tradtional mulit-tier the UI depends on Business Logic, Buinsess Logic depends on persistence etc The idea is protect the core, and persistence or UI concerns adapt to how the core wants to interact with the world.