I made this comment before digging deeper into appropriations impoundment.

However, it still seems plausible (in my limited understanding) that this strategy could still be the goal, if the goal is to first push appropriations impoundment to SCOTUS.

Here is the best cited and approachable article I found on the subject within the context of these events:

https://www.yalejreg.com/nc/the-overlooked-conundrums-of-imp...