Despite the gaming reputation, HWID change is a legitimate technology with many legal use cases. Privacy, license recovery, QA testing, isolating corporate identities — every one of these benefits.
License recovery after a hardware upgrade is the most common scenario. You replaced the motherboard or upgraded the CPU and your DAW/CAD/IDE demands reactivation? An HWID rollback restores activation without contacting support.
Privacy is another large use case. If you sell or transfer a PC, an HWID rewrite breaks the link between the device and your past digital identity. The new owner gets a clean machine.
QA and testing — developers run integration tests on the same physical machine but want each run to look like a fresh "new computer." An HWID change between runs gives clean isolation.