Yeah, I was considering building something that would require more than 50 (100?) S3 buckets. The thought of trying to do it by managing a bunch of independent accounts didn't appeal. I was also wary of infringing some policy by doing that.
For what it's worth, it turns out that GCP doesn't have per account bucket limits.
For what it's worth, it turns out that GCP doesn't have per account bucket limits.