I used to use double poles on my Integral Designs MK1Lite, which has been my primary mountaineering tent. The stock poles can't support a wind or snow load of any meaningful amount, but they have this neat feature that Roger really loves, and that is they collapse on you when the loads get too high, and then pop back up! Pretty keen feature, eh? (sic)
I then did the double pole thing. I didn't have to worry about grommets in the MK1Lite, the ends go into reinforced caps and two pole sets work fine.
I then switched to 11mm Scandium, which was stronger than one stock Al sets, but not as strong as two. But the ease of one pole set was attractive.
Finally, I sewed internal stabilizers into the tent, and a few external guyline attachment points, and used them to stabilize wind and snow loads. They got in the way and were really annoying, but combined with earplugs, made for much better sleep where I didn't have to get up and shovel my tent in a blizzard because the walls were collapsing.
I've since switched to a Brooks Range Rocket Tent. It uses an avalanche probe for the main cross pole and two ski poles for the front support bipod. Obviously the ski poles are strong enough and the avy probe depends on the probe (I use a carbon one - they are much stronger than most carbon tent poles). This tent is completely solid, requires no fooling around, and is lighter. But sadly, it's no longer made.