Yep, 2-4x onsites together a year to develop human relationships, and otherwise 100% remote, is by far the most effective team arrangement IME. It is especially the most accessible format for people who do not necessarily perform their best work within the typical office hours (9-5, +/-1), who do not want to live in your metro area, or who are distracted by disturbances in their surroundings - or just aren’t hardcore extroverts.

Or simply put: if you truly want the best, most focused, highly performing team, an office requirement shrinks your talent pool tremendously for extremely little gain. Do quarterly meetups somewhere and move on, IMO.

Quarterly is a lot, depending on travel distance and whether weekends are needed for travel, for folks with families.