To ozonation thanks for the added information. Yes I'm very much still considering a helix, but the rather steep retail price (i was expecting 2-2.5k, not 3-3.7) and the fact that my Tern node still gives satisfaction is makes it a difficult choice. Of note is the absence of clear mudguard solution at the moment, the node d8 keeps me dry and clean even on muddy roads. That's an important commuting benefit.

​​​​​​The discussion about the size worries me too, at 198cm I consider myself rather tall. I got use to the Tern even for extended periods (full day cycling trips).

Why would I switch from the Tern? At 15kg it's rather heavy to carry but its mostly the folded size is just too big. It will fit a small car and make it slightly easier to board a train without going to the bike section. But that's about it. Can't take it in a restaurant/inside work or in the house. So it stays locked outside. Even in the car situation it's not an easy choice of just fold it toss it and go.

So yeah the helix is very appealing. But I'm still struggling for the reasons invoked.