Was there for the 2019 rugby world cup, 70k packed into a stadium to watch NZ wallop Namibia.
Day before we went to the pub for the afternoon/evening games, and it was standing room only from 2pm right through to Japan's game vs Samoa. There were people standing on the stairwell trying to get in, and handing their money to the person in front of them who would in turn do the same (about 15 people in the chain), to get a beer whilst they waited to get in. Quite incredible.
RWC signage all over the city, was definitely an event they pumped a lot into, but from what I understand they were treating it as a dress rehearsal for the Olympics. That said, people were very much into it. I was living in Asia at the time so being at well produced, well managed events with large attendances was nothing new, but the Kiwis and Aussies I spoke to over there visiting for the first time were in awe. A couple commented that they'd seen the same for Origin, but they couldn't believe the hype for the minnow games in what is still a relatively developing market.
Put a one off game there, promote it for a year, with smart people who understand the local market, we might be presently surprised.