I don’t see many on my local trails the Peak District, West Yorkshire, can’t imagine they are great on serious climbs
In fact I’ve never seen one..
I’d love one but having to climb on a average 500-800 metres a ride I can’t warrant one
You probably haven’t seen one because there aren’t that many out there, nothing to do with your local terrain. I did a big loop on mine in the peaks the weekend before last, 2000 metres climbing, the bike is not the limiting factor.