So they built an object storage to replace filesystem.
And in "Why Not Just Use a Filesystem?", the answer they gave is "the line is already blurring" and "industry is converging".
The line maybe blurring but as mentioned is still a clear cut use case for file system - or if higher access speed is warranted, just slap more RAM to the system and cache them. It will still cost less even at current cost of RAM.
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