This is the classic "money is time, time is money" conundrum. A teenager doesn't have the money to buy a fancy car or computer but they have the time to tweak and experiment to get the most out of it. Meanwhile an adult has the money but not the time, assuming they have a full time job, kids, etc. So they're willing to spend the money to get products that work and would rather spend their limited time with their family instead.

In my teens I had a group of friends who loved to tinker, from hackintoshes to custom ROMs to homelabbing to electronics repair. Now I'm like the only one left who does this stuff :(