How many runners are in a customer install?

How do we handle customizations unique to a specific customer where installs need to differ slightly? If my install fails midway through and I push a fix, do I retry with the new changes or create a new install? With Nuon BYOC, does state stay entirely within our RDS, or does any state data transit through Nuon-managed infrastructure? What's the current and planned approach for automated retry policies on Terraform components? Can we define retry behavior declaratively in the app config, or is manual vendor-initiated retry Why are there AWS resources after I de-provision an install?