The cited studies all date circa 2011. But open office was trending well before then, and studies were done before then. For example, https://www.sciencedirect.

The cited studies all date circa 2011. But open office was trending well before then, and studies were done before then. For example, https://www.sciencedirect.com/science/article/abs/pii/S0272494405000538 https://www.sciencedirect.com/science/article/abs/pii/S02724...