A little more on the above comments, as I just retested the 31N5, 21E, and 17N4. Indeed if I aim for 82 degrees (measured by simply putting a Nagler in the other eye), then my glasses don't need to touch the rubber eyeguard on the Ethos. But to get to 100 degrees, I do have to lean a little. I can get to 100 degrees easily if I look straight ahead. If I try to see the edge (turn my eye toward the edge), then I see less of the AFOV.
Without glasses (strong myopia), the AFOV of the Ethos is astounding. With glasses, the strong negative element renders the AFOV smaller. Feels more like 90 or 80 degrees with glasses on.
I remember the ES92 now. If you have a somewhat narrow IPD (not ridiculously narrow, just somewhat), then the side of the top of the eyepiece hits your nose. You adjust by pulling the eyepiece outward. Without glasses you just peer in the side a bit. If you wear glasses, that means you end up having your glasses block further out, like 5mm (because the eyepiece is now tilted away from your nose). So I ended up losing the benefit of the extra eye relief.
The 31 Nagler is very wide in the middle, but the very top is not so wide, and I can look straight into it, like the Ethos.