Google Cloud list of changes affecting costs

• In-Place GKE Node Upgrades: GKE can now reuse your existing VMs during node pool upgrades instead of deleting them and creating new ones. This keeps your reserved capacity intact, avoids quota delays, and cuts extra surge VM costs during maintenance. Source
• 6-Hour Graceful Shutdown for Compute Engine: You can now give your VM guest OS up to six hours to finish background tasks before a stop or delete event. This stops long data jobs from failing midway through, saving hours of wasted compute spend. Source
• Better Version Controls for GKE Channels: Cluster version and capacity updates now roll out across channels, regions, and zones with stronger change checks. This keeps version jumps predictable and cuts the engineering hours spent debugging surprise cluster rollouts. Source

Source: FinOps Weekly Newsletter