More screen space with the taskbar on the side. I only use taskbar icons so I don’t have (or want) programs stretching across the whole bottom of the screen, they just bunch up together in the top corner. Also 99% of the websites I’ve used in the past decade have had big spaces on both sides to allow for smaller resolutions, so losing that couple of blank centimetres means I gain a couple vertically that actually get used by the site.
That’s been happening for ages. I’m sure if you check the profiles you’ll find other posts with all the same bots commenting. A lot of lazier ones wait exactly a year to repost, and it’s pretty obvious in subs for something like a live service game where they’ll be reposting complaints that are way out of date. One in the Monster Hunter sub reposted a trailer for Iceborne which had been out for 3 years by that point.