Multiple Choice, Single Answer

The concept of work-life balance has evolved significantly in recent decades. Traditionally, work and personal life were seen as separate domains with clear boundaries. However, the rise of digital technology and remote work has blurred these lines. While some argue that this flexibility allows for better integration of work and life, others contend that it leads to an 'always-on' culture where work constantly intrudes on personal time. Research suggests that the key to well-being isn't necessarily separating work and life, but rather finding harmony between them. This might mean different things for different people—some prefer strict boundaries, while others thrive on flexibility. What is the main idea of this passage?