I know a local (inactive PADI/TDI) instructor who still uses a Dive-rite transpac for some of her single tank diving, complete with some of her weight in the integrated pockets. And a short primary reg hose (40"?). I don't know exactly why, probably because its all setup that way and there's little benefit for her to convert - she's not doing air sharing practices with this rig, etc. I think she's got her canister light on it but I can't recall the attachment. She uses a backup light as a focusing light on her camera, but I don't think there's another backup on her.
She uses a plate, wing, 7ft hose, canister on right hip etc. for her cave diving. She's full cave(2) with GUE.
She uses a plate, wing, 7ft hose, canister on right hip etc. for her cave diving. She's full cave(2) with GUE.