The research on optimal hybrid frequency is nuanced. JLL’s data suggests 3 days on-site per week as the point at which employee engagement and wellbeing metrics are most positive. Gallup’s 2023 research shows that engagement is highest among employees who spend 3–4 days in the office per week — sufficient for social connection and cultural participation without the fatigue of full-time attendance. The Gensler 2025 survey found that the quality of the office experience — rather than the number of mandated days — is the stronger predictor of voluntary attendance. Office investment that improves experience quality (acoustic infrastructure, in particular) is therefore more effective at generating productive office days than attendance mandates alone.