Online stores provide many of our needs now, so businesses need to work with local authorities to make better use of office and leisure space to improve the lives of their staff without necessarily reverting to the office
The cure isn't necessarily a return to an office and a diktat of an 8 or 10 hour day, with associated long commutes, it could be working with other businesses to set up post code offices to meet like minded people from other companies, or for groups from the same company (maybe normally working from different sites) to meet locally.
We need to think about how to achieve the best results for businesses and for staff. It has long been proven that self and group motivation gets better results than the 40 hour diktat.
Creating major traffic congestion 3 instead of 5 days a week is not necessarily the best solution