[kibbi]

I prefer to work intensely and collaboratively in an office.

This is how I'd do it: Three in-office days, same weekdays for everyone (e.g. Monday to Wednesday). The choice to have a 5-day or 4-day week.

An energetic, quietly humming work atmosphere, with incidental information sharing and a spirit of collaboration, with colleagues present and nearby, sounds best for me personally. Among other advantages, the presence of coworkers helps me focus.

Different strokes for different folks. Obviously, the prerequisite is that it's a team of nice people you like being around.

Sure, people who prefer to work from home would leave that company. That doesn't mean that this company will lack talent. People who do want to work like that will join it.