Microsoft says Delta does not have modern infrastructure which is why it took them so long. I think that reads as "They don't have cloud servers running and we offered them free servers and infrastructure but they refused" because they didn't want to pay MSFT.
It will be interesting is to know what specific help was offered while Delta was trying to clean up the mess. My guess is that MS were probably using it as PR-op or future up-sells. Delta didn't want to be in business with them in long term as their CEO praised apple publicly.
Let’s be honest, what kind of help could crowdstrike provide other than financial?