I have toyed with the idea but not yet got round to sorting out anything. Though this year I'm going to try growing courgettes up a hazel pole instead of letting them sprawl across my limited space in a raised bed.
Apparently it's helpful for air flow too so less powdery mildew on the leaves, which is always a big problem when crammed into my small beds.
Should be an interesting experiment.
I imagine this system would be perfect for salad crops , say on a balcony or small courtyard area.
Last year, I saw someone growing lettuce in tin cans wired to their front garden railings, but they got stolen!