system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is our current computer storage bottleneck?

So, what limits our current storage speeds? Is it the actual storage medium, the interface from it to the host, or the willingness to develop faster storage?
gpt
There are engineering solutions to all of those issues.  The bottleneck is cost.  Faster equipment is more expensive, and once storage is "fast enough" it's not profitable to make faster replacements.