VR headsets with an external battery pack and/or other heavy components on a cable to put in the pocket (as is now a feature of the Apple Vision Pro).
The first time I tried any VR headset I immediately thought why on earth do they not put all the heavy lifting electronics out of this device into my pocket. That would be way more comfortable. But for some reason it was never done and when it was rumored that the Apple headset would do that I noticed people apparently hated the idea. Everyone keeps saying modern headsets are well balanced it’s not a problem, but my experience is different and it’s one of the reasons for me why I don’t like to use it often.
My current headset is the PS VR2 which everyone says is so comfortable and balanced. I just find it annoying after a few minutes.