Throughout the architecture you will find a mix of static and dynamic modularity. Static libraries are used to make the platform and board code simpler and more approachable. Dynamic linking in the form of UEFI PI Architecture components (PEIM and drivers) as well as large grain Firmware Volume containers are also used extensively in order to increase leverage, scalability, and large grain FV container updates.
An important concept is that the minimum platform is defined with a mix of solutions for modularity, but that said modularity will be flexible. It is intended that products will be able to scale from fully statically-linked embedded solutions to fully dynamically-linked leveraged validation solutions as they reach the end of Stage VII optimization activities. These advanced solutions can be considered derivatives of the platform architecture and should not undermine the strategic objectives of transparency and quality, nor the more tactical objectives of structure, consistency, cohesion, coupling, and compatibility.