If the recovery point objective (RPO) of gold tier machines changes from one hour to three hours with daily retention set to seven days, the impact on the Veeam design is that proxies will require fewer resources. This is because the backup frequency and the number of restore points for gold tier machines will decrease, which means that less data will need to be processed and transferred by the proxies. Therefore, the proxies will have lower CPU, memory, disk, and network utilization and can handle more backup tasks with the same resources.