system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is the internet's upload speed usually a lot slower than the download speed?
gpt
With adsl type connection. There is a limit in bandwidth so you prioritize download since that is what most user use internet for. 

Later on it was used to prevent people from running upload servers since they were a big expense for ISP. 

Fiber connections today don’t have a bandwidth limitation and people don’t run servers at home anymore so most fiber isp run same download / upload.