Violin attack doesn't play 32d notes (q=60) audibly
(All 3.x, maybe more, I'm on Mac. Been so for a long time, but I've never complained).
At quarter=60, thirty-second notes (=.125 sec) (and ergo, trills) are almost inaudible in the "Violin" in the default sound font. In contrast, "Violins" has no problem. A violin that can't play fast notes is a big problem. Viola doesn't have these problems, but sounds expectably different (i.e., not a substitute).
I regret that I have not complained about this before, when something might have been done about it.