Which of the following is disadvantage of open source software?

Open-Source Software (OSS) is software with source code that anyone can inspect, modify, and enhance. While it promotes collaborative innovation, it comes with specific drawbacks compared to proprietary (commercial) software.

• The Core Issue: Commercial software vendors (like Microsoft or Adobe) deploy massive budgets and full-time Quality Assurance (QA) engineers to critically stress-test software before a commercial release.

• The Reality of OSS: On the other hand, unless an open-source project is heavily backed by a tech giant (like Google backing Android), it progresses on a "best-effort" basis by online communities. There is no official warranty, no dedicated customer support helpline, and testing might not cover all edge cases, leading to unforeseen system bugs or unpatched security vulnerabilities.