I am doubtful if hierarchical file systems have anything to do with slow disks. It a design pattern that you encounter all over in real life for human mind to m

I am doubtful if hierarchical file systems have anything to do with slow disks. It a design pattern that you encounter all over in real life for human mind to manage large quantity of information. Using tags is another pattern but with its own pro and cons. Same goes for I/O steams, process hierarchy etc. There may be better designs patterns out there but I don’t see why these existing design patterns would become obsolete even if disks become as fast as RAM.