For network storage some of his points are even stronger. Sure, the page cache becomes more useful as latency goes up but it also becomes more important to send

For network storage some of his points are even stronger. Sure, the page cache becomes more useful as latency goes up but it also becomes more important to send more I/O at once, something that is hard to do with blocking APIs like read(2) and write(2). The page cache is pretty good at optimizing sequential I/O to do this, but not random I/O or workloads where you need to sync().