We had a Little Life carrier for ‘off-road’ duties. We had a bugaboo but it was crap off road despite big pneumatic tyres. A really pain in the ass to push/pull over rough terrain – suspension is pointless, it doesn’t work and the baby didn’t like being jostled around. The backpack was far more comfortable and the little ones were far happier in it. we did 10mile hikes with them – unthinkable with an ‘off road’ pram. Also the bugaboo was massively impracticable – the Maclaren Pliko stroller style pram we originally had was far better in every possible way apart from street cred with the other fashion-victim mums.
Maybe if they did one with 29″ wheels it might work better.