You can test this yourself, the commands in the webpage still work. The Mac still keeps a log of all your downloads and so this discussion is very relevant for 2020.
The linked post shows the commands in allcaps (Safari/macOs) so the actual preference filename is: com.apple.LaunchServices.QuarantineEventsV2
That file contains very few tens of random, mostly old filenames, almost none from Safari which is my main browser.
So at the very least "a log of all your downloads" is a huge exaggeration.
Yes, this is a tiny subset of everything I've downloaded, and includes nothing recent at all.
It might contain everything I've ever double-clicked and been told wasn't safe, but I've long developed a habit of right-clicking and choosing "Open" to bypass that prompt, which seems to also result in no record here.
I'm just guessing, though. I just know this is very wrong: "This will be a list of everything you’ve downloaded on your Mac, regardless of which program you used. The only exception to this is apps from the Mac App Store."
I don't know what version of MacOS you're on, but the commands in this article, even de-styled to take them out of ALL-CAPS, do not work on macOS Catalina.
`ls ~/Library/Preferences/com.apple.lx` does not reveal com.apple.launchservices-anything.
`ls ~/Library/Preferences/xquaranx` does not reveal any file with quarantine in the name.
That my computer logs when it quarantines something, I don't doubt, but this article is very much out of date.
P.S. I couldn't figure out how to consistently include asterisks above, so I substituted 'x'
The modern Mac can use two case-sensitive-capable file systems, HFS+ and APFS. Neither is case-sensitive by default and, at least for many years, formatting the system volume to be case-sensitive caused a lot of problems with applications.
Yes on a second read I meant a case-preserving, not case-sensitive filesystem. The results that `ls` gets are cased and so pattern matching (which is case sensitive by default) on those results will fail with the wrong casing.