It is true that various tape and hard disk system are now offering software WORM emulation, but in your article you mentioned longevity. Tape and hard drive technologies, magnetic and mechanical in nature, have a very limited lifetime both as a media and supported technology. Every 3-5 years for HDD and 5-7 years (or sooner) for tape, users are having to replace this media, for the sake of data integrity, and/or purchase an entirely new system due to technology obsolescence, especially for magnetic tape, where there is very little backward compatibility and many different non-compatible formats. Also, as with any software, it can be modified inadvertently or with malicious intent. Are you willing to risk your organization’s critical business data, your medical records, or your pension on an “emulated” WORM. Or would you rather place your trust on a true Hardware enforced WORM technology, currently only provided by optical disc media such as Blu-ray optical disc, which offers up to 100 years of data integrity, is very durable, and is fully backward compatible (back to the 1982 original compact disc format, almost 30 years!) according to specification and with a healthy forward compatibility and development roadmap.
Don’t get me wrong, intermediary file protection applications such as FileLock are very helpful to prevent accidental erasure of critical data that currently resides in primary storage. When that data, however, has aged and is moved off to a secondary or tertiary tier as part of an organization’s business rules, users should consider a more permanent and reliable form of archival storage to protect their critical information.