yes, its questionable if you are talking about an array of panels where tracking panels need be far enough apart to avoid shadowing each other. My interest is in the case of one panel. Two situations -
1. Campers - right now, to get max sun, we need to pop back to camp and move the panel. Camping right now and moving that panel when I remember.
2. My wife recently sold an "Off grid" home that used a large-ish frame containing 9 or 12 (??) smaller panels. The frame itself rotated to track the sun and provided most of the house's electrical needs. (The tracking mechanism had failed long before I appeared on the scene)
In both cases, the reduced cost of solar panels weakens my arguments !
Davo