I'm a firm believer that, with a record like that, you really only need that first year of marketing to create a long term buzz. Qiddiya isn't opening until late 2024 at the earliest, so CP would have had a decent chunk of 2023 and the entire 2024 season to market that they have the tallest in the world. The general public would have continued to think it's the tallest for years to come, and CP would still have been able to brag that they have the tallest in the US/North America/Western Hemisphere/whatever. I worked on Millennium Force in the mid-2000s and had people come up to me on numerous occasions and say something along the lines of, “this is the tallest in the world, right?” even though TTD was literally right behind them (and also not the tallest). You only need a short amount of exposure for a major record of that nature for it to be burned into the brains of the average park goer.