What are you correcting? I never said there were no Linux defraggers. I only brought up Linux because of how files are placed and you’re taking that out of context and making it about something else. This is discussion of Windows defrag and I don’t want to spend my time splitting hairs.

And that still requires a correction because while most users likely will never need to defragment an EXT4 system on Linux (the OS filesystem handles that fairly well), some still do have fragmentation issues, depending upon the kinds of files stored in the filesystem and the kind of work done on the system, and also depending upon the sizes of the files involved. That is why people have written Linux-based defraggers, including those who write the components to the filesystem, particularly in the case of Btrfs. Even Linux systems can get their files fragmented under certain circumstances. This is especially so if you do a lot of development on a Linux system.

Ninja TuneUp looks like a gigantic bottle of snake oil. And CCleaner doesn’t have a defrag function.
Windows has fairly adequate cleaning and defrag tools built into the OS.
Every product that claims to speed up a PC is lying. The only things that would make a PC go faster would be to make sure there’s no malware running in the background, reduce the amount of things that start up with the PC or a reinstall of the OS.

Excuse me, how is what you’re saying a correction? I never said there were no defraggers for Linux, I’ve read that there was no need to defrag a hard drive in Linux. Those are two separate things. Of course there are defraggers for Linux as the file systems are capable of being defragged.

One correction. Linux does have a few defraggers. One is built-in and requires the command line to set and change the parameters of EXT4 filesystems that instruct the drivers how to handle and work with the filesystem. Another is e4defrag, which is a simple command-line defragger. That defragments file extents on EXT4 filesystems. I use that one after every major upgrade. Btrfs on Linux also has defragmentation methodologies built into the utilities that go with btrfs.