I bought two Yosepower kits, and before you come back with "Chinese crap" I am very pleased with them. To some extent I am expecting them to be "disposable" after about 5 years if the battery holds up that long. By then the technology will have moved on anyway.Which kit did you buy in the end ?
Don't get me wrong. I spent 50 happy years in a rewarding career in engineering during which I had the privilege of visiting and working with many of the UK's leading manufacturers (Rolls Royce, GEC, Perkins, JCB, Ford and Jaguar among them) and nobody is more sad and annoyed about the decline than me. It is what it is.
As you say, the Cytronex kit is not for everyone, but if I just wanted a minimal pedal-assist kit for my vintage touring bike, and I could justify spending £1000 plus, I'd go for it.