If the appeals court rules in favor of Texas, the decision is pretty much guaranteed to be stayed until the Supreme Court rules on it. Which brings us to a decision next summer during what is already slated to be a crazy election year.
If the ACA is defeated again, then it won't be effective until... 2021? 2022?
If it's 2021, a new Congress wouldn't have time to undo the ACA's undoing, but if it's 2022, it could work.
Soooooo, as usual, wait and see.