“The recent AWS SDK bump introduced strong integrity checksums, and broke compatibility with many S3-compatible object storages (pre-2025 Minio, Vast, Dell EC etc).”
AWS turned on new checksums by default in every S3 SDK with no fallback. Cloudflare R2, Tigris, and older MinIO broke. Trino and Iceberg had to switch the check off. AWS writes the client every competitor depends on.