Which open source licenses are you using?
With more than 200 different open source licenses out there, each with its own terms and conditions, some copy-left (viral), some permissive, some permissive with strings, and others with no open source license at all (for which default copyright laws apply), it’s tough to keep track of and fulfill all the legal requirements.
Failing to accurately track licenses is risky business, and can result in some unfortunate surprises. At best it could be just the headache entails in replacing a component; at worst, it could mean jeopardizing exclusive ownership over your proprietary code.