Short version: AWS gp3 EBS volumes cost about ~20% less per GB than gp2 ($0. 08 vs $0. 10 per GB-month in us-east-1) and includes 3,000 IOPS and 125 MB/s of baseline performance for free.
Source: [Dev.to](https://dev.to/jorelfermin/migrate-ebs-gp2-volumes-to-gp3-and-cut-storage-cost-by-about-20-2fk7)