Ad a video editor that relies heavily on After Effects and Premiere, I can say with absolute certainty that the more RAM the better. Currently the 64GB I'm using is filled quickly just editing 30 second commercial spots and makes a world of difference when actually working.
Also, I normally have Photoshop and Premiere running in the background to make on the fly edits and graphics so that also helps with workflow. This is in addition to a 256GB SSD used just for Caching the video.
I didn't just test these one evening, I've spend years with this on a dozen different machines. While I appreciate the article, it's just wrong when it comes to video editing in the real world, the more RAM the better.
If you're in AE, all you have to do is watch your little green line that indicates "rendered frames", if you're light on RAM, that line will "move" along the timeline as there is not enough memory to render the entire projects (30 second videos in my case), 32GB will get it further and 64GB or more allows me to cache the entire thing. Granted we work with multiple 4k Cameras, but that just thought I'd mention it.