[colechristensen]

In ‘05-10 timeframe we had a selection of Sun machines around the engineering department running various software and were even evaluating new Sun hardware for file servers when ZFS was new.

Later on in eh, 2015 or so I worked at a company providing backup software that was tested and worked with every niche unix hardware under the sun. Usually to support large legacy industrial companies, think defense, materials, etc. who still used the hardware.

Banks will also use these things mostly for legacy reasons. The software got written once and has been working and validated for decades, no reason to rewrite it for a different OS just because.

Price is usually not a major factor when compared to the size of the business and number of employees.