Domain knowledge should be available in the team, not necessarily every member of the team. Together with good communication this solves the issue on a 80/20 ba

Domain knowledge should be available in the team, not necessarily every member of the team. Together with good communication this solves the issue on a 80/20 basis. The exception is of course if you work solo, in which case it does indeed become a full stack problem of sorts. Individuals who can pull this of can make significant impact.