[META] Architecture Design Workflow: New Diffs

Context

This issue is meant to track the efforts done in the context of the Architecture Design Workflow for New Diffs:

• Kickoff issue: #422215 (closed)

Tasks

Let's document the tasks we do during this milestone.

%16.7

• [ ]
• [ ]
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%16.8

• SSR overview presentation
• SSR + streaming from rails collaboration
• weekly discussions

%16.9

• [ ] Workhorse discussions
• [ ] 

%16.10

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(Besides the Deliverable issue to Work breakdown: New Diffs)