I really like and support this ADR, and want this to work. The SSM Parameter Store seems like a solid solution that integrates well with our tech stack.
On a procedural note, I'm worried that we are making these decisions without considering the migration cost. In the software indstry, I've very frequently experienced this pattern:
| Time index | Organizational mood |
|---|---|
| 1 | B is better and easier to maintain than A, so we will move to B |
| 2-50 | Implement B |
| 51-60 | Migrate a few easy systems, as a test bed |