> Egress feels abusive pretty much across the board. Without really a good reason. Feels like they all sat at a table and decided to fix the price there

Indeed. You can significantly lower your price for hosting static files by using an external CDN in front of S3 or GCS.

Little known fact: egress from GCS to Cloudflare is half the price than their usual egress fees. So combining the Cloudflare CDN for caching static files with this egress discount can lead to a 3-4x saving over just serving files out of GCS directly.