system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Its been implied wizards of the past were measurably more powerful than those today. Examples include stories of feats modern wizards can't do and old magical artifacts that can't be duplicated. (eg: sorting hat, philosophers stone, deathly hallows) Is there a reason for this?
gpt
It is the same as somebody saying 'no good music is produced these days, the music of the 60s/70s/80s was much better'. There was a lot of worthless music/crappy magical artifacts in the past, but only the good music/powerful artifacts survived to the present day, giving a skewed perception of the past.

There are plenty of powerful items being produced in the present day, such as Voldermort's horcruxes or the Marauder's Map, but you don't notice them as much because of all the cheap modern tat that abounds, such as the Weasleys' novelty products. The items of the modern era that are powerful enough to stand the test of time will eventually develop their own legends, like the feral Ford Anglia currently living in the Forbidden Forest.