I'm 40 in May, I have a few old cars lying around none of which are particularly valuable, I just get enjoyment from working on them. Our day to day car is currently in the car park here at work (out of town industrial estate) because I didn't cycle today. It's 15 years old, has 135,000 miles on the clock and there are younger people here with much bigger nicer, newer cars who probably look at me in disdain and I really don't care.
I don't know many other nearly 40 somethings without a mortgage and absolutely zero debt. I know I'm lucky and not having kids has a significant impact on disposable income but I get to go on ski-ing holidays and cycle tours through Europe rather than watching (figuratively speaking) my bank manager go on such trips.
If my job ends tomorrow I won't worry, I'll probably not go on holiday in the summer but I'll be OK for a while. It would give me a chance to get one of my old wrecks back on the road!