Age 25 here. I've considered myself an audiophile for about 10 years of so, about the time I started seriously collecting vinyl. Like others have stated in this thread, I hold the concept of being an audiophile in more rooted in mindset than an actual equipment setup. I remember in high school I didn't have much money for gear, so I mostly listened to my parents neglected 80s Kenwood setup. My first real "audiophile" product that I got was a pair of Grado SR-80 headphones, that really let me know that there was something more out there.
As for this whole vintage vs modern nonsense, I implore everyone to not view audio gear in absolutes like this. They both have their merits and there are all sorts of debates about price, longevity, etc. Although my current set up is decidedly vintage (most of my gear is 10+ years older than me), I wouldn't say that I -or most 'audiophiles' of my generation- are not open to newer gear. There are plenty of opportunities to buy good used gear, or new class-D gear cheaply. My best advice is to let your ears do the deciding within whatever budget you choose, pick out some good tunes and enjoy.
Glad to see so many folks around my age on here. The world needs more folks that care about quality.