Use ～に限らず in reports, proposals, and announcements to state that something applies beyond an obvious or expected case — "not just X, but also Y." It is a written/formal counterpart to ～だけでなく, and typically sets up a broader scope in the following clause (often marked by も). Reach for it when you want to preempt a narrow reading of your claim, e.g. showing an issue is industry-wide rather than company-specific.