"Fun" fact: if you think it's slow normally (and to be fair, it is), NTFS seems to have a pathological performance regression when a directory contains more than 10,000 children, any operations on files in that directory slow down by around 95%.

I discovered this on our CCTV system at work (that runs on Windows Server 2022), which creates an inordinate number of small files (each containing at most a few seconds of video). It was causing some of its periodic maintenance tasks to fail, as they'd take longer to run than than the configured interval between them.

Windows also really doesn't like dealing with half-petabyte filesystems, just like... at all.