This was AFAIK one the few hard limits, however this changed in 2015 https://aws.amazon.com/about-aws/whats-new/2015/08/amazon-s3-introduces-new-usability-enhan

This was AFAIK one the few hard limits, however this changed in 2015 https://aws.amazon.com/about-aws/whats-new/2015/08/amazon-s3-introduces-new-usability-enhancements/ https://aws.amazon.com/about-aws/whats-new/2015/08/amazon-s3... where you could request to get more buckets