Compiling a list of different scenarios for different combination of EUS upgrades can help the team understand and catch cases we might need to consider

For example:1
ACM is out of support (n-1) + OCP still supports version n and n-1 EOL * customer has 2.8 (n-1) on OCP 4.xx that supports version 2.9

• 2.8 EOL
• can customer still upgrade to 2.9?

2
ACM is out of support (n-2) + OCP still supports version n-1, n-1 EOL * customer has 2.7 (n-1) on OCP 4.xx that supports version 2.9

• 2.8 EOL
• can customer upgrade directly to 2.9?

3
ACM is out of support (n-2) + OCP does not supports version n-1 (can this happen?) * customer has 2.8 (n-1) on OCP 4.xx that support version 2.9

• 2.8 EOL

customer cannot see 2.9, what should they do?
this may be unsupported now but may change with skip level upgrade4
ACM is running an old version of ACM + OCP and upgrades OCP to a version that doesn't supports the installed version of ACM
does their ACM still work?

Starting Doc https://docs.google.com/document/d/117D-GwXb6FqTqO-CKIKI3o_OsdUEyDHXLtdL3VJ__9Q/edit?usp=sharing
Table https://docs.google.com/spreadsheets/d/1Z9pK4jyzZW0G7WWlmeMoRVhSX6xPKQ2FZMBbMB-ukqU/edit?usp=sharing