We are truly spoiled by all the improvements that went into local filesystems that are lacking in network filesystems. So much of our perception of "computer is fast" is really just write-caching, read-caching, read-ahead.

Oh nvme and commodity 10/40/100gig networks mean that NFS shares can be _faster_ than local disk

In 2008 when I was a youngen, 100tb filesystem that could sustain 1-3gigabytes of streaming throughput took something like 40 racks. Huge amounts of cost and power were needed to set it up and maintain it. Any kind of random IO would kneecap the performance for everyone

Now you can have a 2u server with 100tb of NVME storage and the only bottleneck is the network adaptor! not only that but its pretty cheap too.