The problem with B2 is the API request costs can easily bring it over 1.5 cents per GB per month. If R2 can keep to free egress and free (or at least the cheapest) API requests, it will blow all other competitors out of the water. The only provider who provides free S3 compatible with free egress and free API calls is Linode at 2 cents per GB per month. The downside with Linode is your S3 is limited to one region. For now though they are an amazing choice because I can have cheap S3 with unlimited egress in the same region as my managed k8s, also with unlimited egress. The main thing that stresses me out with Linode is having to manage my own SQL database...