Is it correct to assume that capacity increase is dependent on the type of data or usage of the disk? Are there estimates by function here for what to expect real world by use case?
Absolutely correct. The compression ratio is dependent on the type of data (anyone who tells you differently is misleading you!). We have a compression estimator tool to let you test your data (with or without having deployed our drives, the estimator mimics the compression algorithm in the drives). That said, we have examples of the CR customers have realized across a variety of data types.