I read somewhere that the reason why bunnies love to chew chords is instinctual. Kind of like in the wild they will chew through vines/roots to have escape routes and such. I don’t know if it’s true though, lol, and I can’t remember where I read it. PVC pipes sound like a great solution. I believe a lot of people use aquarium tubing or just block off an area with grids too. You can see examples in the bunny proofing article:
https://binkybunny.com/BUNNYINFO/tabid/53/CategoryID/8/PID/940/Default.aspx

PVC piping is a good solution, for certain wires. The issue is it’s harder to get PVC piping through doorways and such (since it’s not bendable to make flatter to fit through the sides of a door when ti closes). What I use is the vacuum tubing they use for car audio wires, which is hardish plastic, though still have to check for chewing spots, it’s pretty loud if they chew it so it deters them and warns me if they’re being naughty.

I’m using a sort of hard plastic tubing if that’s what you mean?
Only issue with it is that it’s not super flexible so I can’t bend leads around corners (no big deal really!)
It’s interesting to hear that the chewing of wires is instinctual, MD, I’d never heard that before! I guess it makes sense though – learn something new every day on this forum, eh?

I must have been typing that as you typed so I didn’t see that post until after I commented!
I guess we are talking about the same thing by the sounds of it!