I had a pair of folding 2.25s after they came out. First ride out on the Arkle Loop I tore a sidewall on the rear at the head of Glen Golly but managed a bodge which saw me out. Was lucky in such a remote location. The bit of track it happened on isn’t that rough and I was climbing at the time.
Decided then they were too flimsy for rear use, but maintained one on the front and kept it on the bike for a few weeks, but found it burped a few times and I lost confidence in it … the tread wasn’t great for a front tyre either.
I imagine if the sturdy Crossmark 2.25 LUST carcass was on the tyre it would be fine on the rear, but really I can’t see a single reason to choose this over (for example) a Crossmark, HR or Ardent. It doesn’t do anything particularly well IMO.