Openness in cultural institutions can provide benefits but also limitations that must be addressed carefully. Benefits include open standards enabling interoperability, open source software encouraging innovation, and open APIs and content fostering creativity. However, open culture can enable unmoderated user content issues and legal risks. Open standards may not be adopted or can be complex. Relying on third parties' open APIs introduces business model and support risks. Addressing limitations requires contextual, risk-based approaches and consideration of sustainability and intended purpose.