Reckon it's primarily cost followed by perceived image.
When you're in your teens and early twenties it's cost + in some cases the image factor....Lotus would be the brand the young-un's would be leaning towards rather than Morgan.
When you're in your thirties it's kids and hardwork
When your in your forties, you start dreaming about it more, and if you have the money and a place to keep it you take the plunge..
..but it tends to be the fifties when you start saying to yourself if I don't live my dream now, I never will.
I regard myself as being very fortunate because I got my Morgan in my mid forties.