No, not vibrato, reverb. The venues were built for the music, and vice versa. Even chamber music was written with a smaller amount of reverb in mind. If you play a simple Bach piece a Capella in your living room, it's pretty boring. Play the same piece in an old Catholic cathedral, and it will make you cry. Electronic reverb was invented to try and replicate the way the music was meant to be heard. The most difficult classical collection to record might be Handel's "Water Music". It was written to be played on a large barge floating down the Thames.