system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it that products made 50+ years ago seem to be so much better than their modern day counterparts? (i.e. Fans, shaving razors, knives etc.)
gpt
I don’t think they necessarily are. 

It’s just the ones that have lasted to the modern day are the ones you probably handle. All the low quality stuff broke decades ago and only the high quality stuff is left.

This is an example of survivorship bias. Since your experience only contains products that have been durable to survive into modern day, it seems to you that these products from back then are better.