system
Given the following post, respond as if you're commenting on Reddit:
human
[General] why are magic from an bygone era stronger than magic from the current era?

this seems like a very common thing in fiction involve magic,for example harry porter and the elder scroll series, ancient magics are way more powerful than the current magic. You would imagine after all those years, magic users would have more time to study and improve their spells. It seems magic is the opposite of science which improve over the time. I mean you would not trust a cure for herpes from a 3000 year old medicine book.
gpt
The biggest problem with this question is that it depends on the universe and source material. There is no definitive answer. So here are a few of the more popular reasons that have been given.

- Entropy. Primordial magics fade over time, so over time magic just gets weaker. 

- Lost Art. It’s as simple as “people have just forgotten how to do the cool stuff”. 

- Limited Resources. Similar to entropy, except magic comes from certain places/things and there are less of them now, so less magic in general to go around.