Microsoft Japan’s 2019 trial, which reported a roughly 40% rise in productivity during a month-long experiment, and national pilots in Iceland and the UK renewed interest among executives seeking better retention and wellbeing. Yet not everyone is convinced these short-week models deliver sustainable business advantage. Entrepreneur and productivity teacher Alex Genadinik warns that reduced hours can erode the “passionate immersion” that drives deep insight and long-term competitiveness.
What the trials show
Short trials and pilots often find quick wins. Microsoft Japan’s “Work-Life Choice Challenge” shortened the workweek for employees and combined it with meeting reductions; management reported higher output per hour and improved morale. The UK’s widely publicized 4-Day Week trial, run with researchers and multiple companies, found many participating firms maintained or improved productivity while employees reported reduced stress and greater work-life balance.
But results vary by industry, role, and trial design. Pilots are typically short, voluntary and carefully managed, which create conditions that can overstate benefits when scaled to entire multinational operations. Customer-facing, production-line, and continuous-service roles face scheduling and coverage challenges that office-based knowledge teams do not.
Large-company experiments: lessons from practice
Some global firms have tested compressed or flexible schedules rather than a uniform four-day week. Microsoft’s experiment is often cited because it combined structural changes (no-meetings days, meeting length caps) with the compressed schedule. The subsequent research has shown that gains were tied to those productivity-oriented measures as much as to fewer days in the office.
Multinationals such as Unilever have run targeted pilots across markets, emphasizing role-by-role assessment. Tech companies and remote-first firms typically emphasize flexibility over strict four-day rules, letting workers compress hours or work reduced weeks depending on deliverables and customer needs. Manufacturing and retail groups, for example Luxottica, continues to run a flexible working trial that also maintains operational continuity, supply chains and customer service require layered planning, often reducing the net benefit of fewer scheduled days.
Where the expert’s concerns fit
Genadinik’s critique centers on two linked risks: premature outsourcing/delegation and the loss of deep, immersive work. “I’ve seen a negative impact of the idea and application of the 4-day workweek,” he says. He argues many adopt delegation too early, and that the cultural valorization of reduced hours can diminish the appetite for hard, immersive effort. In his own experience, stepping back to work fewer days reduced his business’s momentum: less immersion meant fewer improvements spotted, less networking and collaboration, and competitive lag.
This perspective aligns with real-world difficulties from trials. Shorter weeks can drive sharper prioritization, importantly forcing teams to cut low-value tasks and refine focus, but they can also compress that work into higher intensity and shrink opportunities for collaboration. The Microsoft Japan trial succeeded in part because it deliberately cut meeting sprawl and restructured workflows: where organizations simply remove a day without addressing meeting culture, coordination, or customer expectations, Genadinik’s concern about lost “deep work” is more plausible.
Balancing the trade-offs
Evidence suggests the four-day model can work if implemented with care: limited pilots, role segmentation, and process redesign matter more than the number of days on the calendar. Companies that reported the strongest outcomes paired reduced days with explicit productivity reforms, such as meeting limits, clearer priorities, and strict outcome-based evaluation, countering Genadinik’s point that fewer hours inevitably mean less progress.
However, his warning that “people who do less work will usually get passed by others who are harder-working” is pertinent, especially for growth-oriented firms. For founders, early-stage businesses, and sectors where deep immersion accelerates innovation, shortened weeks may risk slowing the iterative learning and networking that produce breakthroughs. While trials of the 4-day work week have become common in larger companies, growth-oriented small-scale businesses will likely find any change to the current work week difficult.
The four-day week offers genuine promise for wellbeing, and, under the right conditions, studies have shown that it can increase productivity and increase worker satisfaction. Yet the model is not a one-size-fits-all panacea. Experience underlines a core truth: without careful redesign and respect for the demands of work, shorter weeks can trade immediate comfort for slower long-term growth and less competition. Employers who test the model thoughtfully, implementing other reforms, and remain willing to adjust roles, processes and expectations, are most likely to capture benefits without paying the price for the reduction of working hours.
