HELL YEAH. Sounds like when the state trooper in Georgia stopped a car from Virginia with an older couple whose wife was hard of hearing. The trooper told the old man driving that he once dated a woman from Virginia. Said it was the worst piece he ever had. As they pulled away his wife asked him...
Check out EBAY, or MECUM auctions or Barrett-Jackson. Going price even now after over 2 years of production ranges from $10,000 to $30,000 over MSRP. There is no such thing as list price anymore.
It has absolutely nothing to do with the prop shaft. It's the "transmission fluid". The dealer you bought it from should replace it with a revised fluid free of charge. GM never made a recall for this issue. The issue was found in 2017 or 18 and all GM dealers in the US were sent 55 GAL barrels...
I have a 2016 /A8 when around 20000 miles it began to vibrate like a shudder feeling. I contacted GM and found a tech notice sent out in early 2019. It included most everything including pickup trucks with the A8 transmission. 55 GAL barrels of a new formula transmission fluid and a special pump...