I have a 3.7 roadster purchased new in 2019. Like StevieMac I have not experienced this Rev hang issue or if it is there I have not noticed it. What is funny is that in my youth I used to take part in rallies and one of the most common modifications and seen as a great benefit was to set the tick over at about 2500 revs. This created the “rev hang” that everybody on here moans about. The other thing I find strange about the roadster is the number of people who moan about the gearbox. Yes, first gear is very low, but great for hill starts, but apart from that I would say one of the nicest boxes around. My previous two Morgan’s had the Mazda gearbox which everybody raves about but give me the roadster one any day.
DONT worry about it drive it and you will love it.
