I previously had many negative associations with VESA-mounted monitors, and I think other people have as well, due to poor-quality mounting arms. I've used VESA-mounts where monitors bounced every time someone walked by; that's a serious issue.
When I started working from home full-time, I set up a high-quality VESA-mount system using a pole mount and a professional monitor arm; the service I purchased it from actually looked up the monitor specs to figure out the level of support the arm required. The resulting setup is rock-solid and always stays exactly where I place/tilt it.
So I do think VESA-mounting can provide a great experience, but the difference between cheap and high-quality can make or break the resulting experience.
It rotates. The stand just rotates with it. I'm not just being cheeky, it's actually pretty easy to move around. The stand is so thin and flat that I liked having it be a place where I slide in my keyboard when I want some desk space.
My main workstation is currently a PC with monitor on an arm, but honestly, I found the iMac to be a cleaner setup. Literally the only display-related issue would be height adjustment, but that wasn't a problem for me.
I specifically ordered the VESA iMac model because of both the limitations of height, etc, and the space on your desk that is freed up by using a mounting arm.
A mounted VESA arm is such a nicer experience