Yes, the old unit focusing macro designs can look rather weird and somewhat unstable when fully "racked out". With internal focusing this has been "fixed", alth

Yes, the old unit focusing macro designs can look rather weird and somewhat unstable when fully "racked out". With internal focusing this has been "fixed", although they still need a lot of displacement of the focusing group (in the Nikon 200/4 AF for example it's about five cm if I remember right, which is a lot for an IF design). Most macros still have a lot of external movement, but internally floating elements reduce the required displacement still. (E.g. Tokina 100/2.8, about 6 cm displacement of the main groups, since helicoil - a cam our two for tiny adjustments of two other groups.