I saw a request by Liverpudlian82 on Skyscrapercity to add a crowd model to their stadium. It's a near 60,000 seat venue, and I saw it as a good opportunity to test out my crowd model on a much larger stadium than I normally design. The crowd model held up well (despite ending up being very heavy), and I think the end result looks great.
I've also been learning Twinmotion (slowly) over the last few weeks, so I would love to see how this looks in there. Twinmotion might actually handle the weight of it better than Sketchup did.