Germany has “rechts vor links” (right before left, defermined by direction of approach) right of way priority, but only when not otherwise marked and typically in low traffic and lower speed areas. So in a residential area the T stem would have right of way to the left side of the T cross, but has to yield to the right side. In higher traffic and/or higher speed areas the main road more often has right of way, regardless of continuation or termination. So you can also have T intersections in which one of the sides of the T cross have to yield to all others.

Most of the time it just makes sense in terms of approach speeds and traffic flow to have the continuing road take right of way.