Advantages include.
a. Increased Mcrit (due to reduced effective thickness to chord ratio).
b. Increased Lateral Stability.
c. Increased Directional Stability. But b and c do not necessarily result in
an overall improvement because of the greater tendency to Dutch Roll.
d. Reduced tendency to structural divergence (one way flutter), so the
structure can be lighter.
e. Increased stalling angle (but this is offset by reduced Cl at any given
angle of attack so the downside is an overall increase in Vs.
f. Less profile drag (but at the expense of greater induced drag) due to
reduced aspect ratio)