Crowdstrike has released an RCA about the recent major outage.
According to the introduction it is less technical and uses generalized terminology. I would not subscribe to that. The document is extensive... after fighting your way through a protective layer of bullshit.
Drupal 7 will be retired on January 5, 2025 after 14 years and this time the date is likely to be final, making an upgrade to Drupal 10 or a complete system switch unavoidable if you don't want to pay extra for support.
After Microsoft was already a victim of the CrowdStrike update in the middle of the month, a DDoS attack has now been added to the mix, which has succeeded despite protection mechanisms that were apparently not configured correctly.