The way people on imageboards tend to talk about neuroplasticity is overly simplified and generally combined with the cynical crabs-in-a-bucket thing since people tend to be overly negative. It does weaken as an adult, but not to the degree that people thought decades ago. Will you learn a new language in your 70s as easily as you would if you were 6? No, but the same is true if you were in your 20s. What does change, however, is motivation and the amount of free time people may have.
>>119045>"time feels faster as you age" phenomenon is a thingThat's generally seen as a result of routine and the brain working on autopilot. I remember reading that one way you could remedy this is do make simple changes in daily actions, like changing the route you take when driving and so on. If you're doing things unconsciously then time feels like it's moving faster.
As for the musical tastes thing, I wonder if it's related to the way our personalities are pretty much locked in place by the time we hit 15 or so. Maybe musical taste is somehow influenced by this, but who knows?