As I recall...
...part of it is playing styles have changed...vibrato is a relatively latter-day, some would say, affectation...it's more difficult to hold a rock-solid sustained note...Probably the reason period pieces on original instruments sound different.
Mozart did in fact write for the flute...perhaps not a fave of his but, so did Bach and Vivaldi and they both pre-date him...not sure if the instrument's evolution was all that stunted, sound-wise...
jimHJJ(...drums, plucked strings, vibrating air columns...I think that's the order roughly...)