I've been using straps for 20 years, every chain I've tried just feels kinda "clunky".
I've only ever broken one strap, it was leather and probably happened 19 years ago.
I stretched the strap that came on the pedal I got in the early 90's, it was more of a reinforced vinyl with a mesh webbing and replaced it after maybe 10 years due to the bottom of the foot board bottoming out?
The IC I use now has a Kevlar strap, it has started to fray a touch at the pivot point, although I do carry a spare, (just in case), I trust it'll be a long time before it goes. Had it for about 5 years.