When looking at the term "continuous requirements engineering", there is a limited number of sources using this term in different collections of scientific papers. However, while the term is not so often used, still the ideas with respect to different issues of continuous requirements engineering are discussed in papers on enterprise architecture, business process management, and adaptive information systems. The paper lists different challenges in continuous requirements engineering (1) by looking from the perspective of enterprise architecture and knowledge involved in requirements engineering and (2) by considering ideal linkages between knowledge, enterprise architecture, business processes, and development projects. It also refers to the current work under the query "continuous requirements engineering" and briefly discusses how it helps to meet various challenges of continuous requirements engineering.