"Torsion bar failure is practically unheard of. For an example: Go find a Volkswagen Type 3 of of any year and you'll see 35+ year old cars with the original torsions for the rear hatch and/or the hood."
Yes, very reliable.
I looked at the torsion bar setup for my 05 Ram and read some of the reviews. I think I saw only two negatives in over 100+ reviews. (not that I read 100 reviews)
1) Evidently the gate needs to come off to install and some how the bar caused a dent trying to install.
2) One bar snapped after a few months.
I had a torsion bar in a '66 Charger snap. Maybe 10-12 year old bar at the time. Sounded like a small cannon went off and the front right of the car dropped to the wheel instantly. Scared the daylights out of me. That said, my '69 Cuda still has the originals, under the front end and in the trunk.
Anyway, yeah, they can break on occasion.
For the Ram, I ordered the DeeZee cylinder. Appears to be an easy install. If it works as advertised I'll be just fine with that.