I have seen various multivariate statistics book covering Hotelling $T^2$ statistics. However, when reading medical journals and papers, it does not show up anywhere.
Q1:Is this test of any practical value? All I can tell is that it detects multivariate mean of multi-groups equal to something. I could also use ANOVA contrast matrices instead. Hotelling will require asymptotic result. So I would guess it has lower power compared to ANOVA contrasts as ANOVA may not be sensitive to deviation from normality in small sample case.
Q2:Why is it still covered in multivariate statistics book, even if it is not seen a lot in journals and papers?