Those are excellent point RE recording and rehearsals, and very true. The orchestras that use them most effectively tend to be those using period everything. There is also the matter of the old orchestras vs the new. The old players were professional players, and, sad to say, most of us playing in modern orchestras are weekend warriors by comparison. It's like the difference between getting the occasional gig playing with a blues band vs the workout the guys get playing in the Mnozil brass organisation. In a perfect world, we'd all be getting paid work six days a week.