I still think they need to come down considerably on the weight. Until it is as light as wearing sunglasses, I think it's going to cause fatigue, especially for children.
It's not a solution to drive adoption, but if fatigue due to the weight is an issue for today, one solution is to add more weight on the other side of your head.
I bought some head-mounted night vision gear a couple of years ago, and found that even a single PVS-14 (easily <1/2 the weight of a Quest 2) mounted in front of your eye is heavy enough to cause neck strain after an hour or two, especially if you're moving around a lot. A properly fitted helmet with a chin strap helped keep it in place, but the neck fatigue remained. I added a small sandbag on the back of my helmet to offset the weight of the optic, and the problem was almost entirely resolved.
With my Quest 2, I replaced the OEM strap with a "comfort head strap" From KIWI design. I then found a USB-C power bank that weighs about the same as the Quest headset, and 3D printed a holder for it to attach to the hard plastic frame of the head strap in the middle of the back. Not only has that resolved my neck fatigue issues, but the battery pack means that I can use the Quest 2 all day if I wanted without having to recharge, and without being wired to an electrical outlet.
