I’ve seen the video, and it’s very impressive, but it still feels like plastic to me.
I was a plumber/heating engineer for 17 years up to last year and I never used any plastic pipe. The copper just feel more robust. Same theory with bikes I suppose.
40MPG – I think I read it’s 5 years, but I only keep things for 2 maybe 3 including our cars so that’s ok. I get bored easily!! I’m suprized my wife has lasted 10!!