Hahahaha!
Yup that's exactly how it always goes. GM shows the concept and then the actual car is NOTHING like it. Like maybe the ash tray or dome light bulb is the same. GM can make what they want when it comes to buick. It's a brand that does not resonate with anyone under the age of 70. Their idea for keeping the brand relevant was to make everything a hideous SUV because well GM likes to ignore the fact that pretty much every time you see a Buick still on the road it's a "sedan".
Buick wants to target the younger hipper market by making everything that market doesn't want apparently. All GM ever had to do was release a new GNX. It's literally the only Buick the younger generation cares about and the only Buick they know. How many decades of people fantasizing over the return of this car will there be before someone at GM gets the hint. Make something to compete with the new Nissan Z. A Turbo V6 Performance built Buick with the GNX label on it (not that wimpy regal either). Dodge has their Demons, surely GM can dish out one 2024 Buick GNX.