"Together, our evidence suggests that RTO mandates are costly to firms and have serious negative effects on the workforce," the study concluded, echoing some remote workers' complaints about the seemingly non-data-driven logic of RTO, while urging that further research is needed.

"These turnovers could potentially have short-term and long-term effects on operation, innovation, employee morale, and organizational culture," the study concluded.

A co-author of the "brain drain" study, Mark Ma, told Ars that by contrast, Glassdoor going fully remote at least anecdotally seemed to "significantly" increase the number and quality of applications—possibly also improving retention by offering the remote flexibility that many top talents today require.

Ma said that next his team hopes to track where people who leave firms over RTO policies go next.

"Do they become self-employed, or do they go to a competitor, or do they fund their own firm?" Ma speculated, hoping to trace these patterns more definitively over the next several years.

Additionally, Ma plans to investigate individual firms' RTO impacts, as well as impacts on niche classes of workers with highly sought-after skills—such as in areas like AI, machine learning, or cybersecurity—to see if it's easier for them to find other jobs. In the long-term, Ma also wants to monitor for potentially less-foreseeable outcomes, such as RTO mandates possibly increasing firms' number of challengers in their industry.

Will RTO mandates continue in 2025?

Many tech workers may be wondering if there will be a spike in return-to-office mandates in 2025, especially since one of the most politically influential figures in tech, Elon Musk, recently reiterated that he thinks remote work is "poison."

Musk, of course, banned remote work at Tesla, as well as when he took over Twitter. And as co-lead of the US Department of Government Efficiency (DOGE), Musk reportedly plans to ban remote work for government employees, as well. If other tech firms are influenced by Musk's moves and join executives who seem to be mandating RTO based on intuition, it's possible that more tech workers could be forced to return to office or else seek other employment.