Kit redesign roadmap

[dorner]

Summary

Design and decide on an implementation roadmap for the kit redesign - #3562 .

Things to consider

Think about:

• Can we split up the work into multiple tickets?
• Can we minimize the disruption to the data?
• Can/Should we do things like strangler fig pattern, double writes, etc?

Criteria for Completion

[] Roadmap is recorded in this issue [] Roadmap is discussed with core team and any feedback is incorporated [] Resulting issues are created