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5G Transport - A 2023 Heavy Reading Survey 2023 Open RAN Operator Survey Coherent Optics at 100G, 400G, and Beyond Open RAN Platforms and Architectures Operator Survey Cloud Native 5G Core Operator Survey Bridging the Digital Divide 5G Network Slicing Operator Survey Open, Automated & Programmable Transport The Journey to Cloud Native
I think the 'metro node' concept is a collection of functions logically grouped, rather than a specific description of what a box should do. So it doesn't really matter if the metro node comprises one box or a few, as long as there is a stable platform to perform the required functions.
I imagine you'll find the same thing with the MSAN - doesn't matter if it's all in one box or not, as long as all the required functions can be put in the MSAN space.