25-yr plus cars are still very complex and will in my opinion never be popular.
A 1908 'Silver Ghost' can still be got across Asia, but a 1984 Camaro?
There will be a big industry built around old cars in the US., but it will be middle-aged men mostly. I see fat middle-aged men in [mostly] Ford muscle cars every Sunday. Sometimes they are Chevrolets. They don't drive fast, and never come out if it looks like rain.
I feel rather sorry for them... and the older bikers on Britbikes.
I like my V8 mechanic friend. He races carb cars and breaks things and fixes them.
I don't like restored machines of any style, including steam.