I can understand that, but if I were running the event, I would personally have a giant hard drive and a backup for archived media. You never know when you might need those sound files again. I mean I hear sound effects from the audio triggers that have been used since at least 2010. I've heard that same drill sound used in the houses since 2010's HotTC.
But I digress. That's awesome they were able to get the same voiceover person.