“BUT – what about mods for winter you guys may have made??”
Back in the 80’s, I modded a TNF Tadpole, a three season version of the well respected Westwind (a tapered hoop style tent) with a pair of crossing poles, using some Sierra Designs grip clips and extra grommets. It allowed the tent to both shed some snow and become semi-freestanding. Having zero budget back then, it was my “Poor Man’s four season tent” for the next several years.
Nowadays, my 2-door Eldorado still works quite well, and have never had any ventilation issues, even in cold/humid conditions. The simplicity of a wedge style tent is hard to beat, imho (as long as one entry can be well protected. I only attach the vestibule when necessary.)
Back to the mod; Nowadays, I could see the same type of modification I did work well on a Hilleberg Anjan or Nallo ( should it ever be warranted.) Even a light CF pole which clipped to the peaks of the hoops, and followed the “spine” of the tent, could add just enough rigidity to easily shed more snow than originally designed. But I don’t know how Hilleberg would appreciate that mod, should you ever go for a warranty repair. I’d think Henry Shires might be genuinely intrigued with a well modded TarpTent.