lugged or tigged or whatever frame, i think it all comes down to the bar choice, for stem aesthetics.

risers, bullhorns (in all their many variations), threadless is cruicial.

flats and drops, in particularly track drops, the quill makes it.

for me atleast. a quality stem threaded or not is a stem is a stem is a stem is a stem, imho, so it really comes down to aesthetics.