When you're regularly working with largely sequential datasets with sizes ranging from 100GB to >1TB that you're not processing at speeds in excess of 100MB/sec, hard drives are very much good enough.

Especially now that the same 4TB NVMe SSDs I was buying for $300 are now selling for over $1,000.

In my case, the source of the data is S3, so there's no need for redundancy, as the hard drive is effectively a local cache for cloud storage and the work isn't nearly so time-critical that an occasional failure would be more than a mild annoyance to a customer, if that.

Same for archival backups. Faster recovery time than Glacier Deep Archive, less cost over a period of years, simpler and less expensive than tape for modest volume.