Ah, you obviously didn't have top of the range Huret - they were made from new bean tinsI remember having sun tour, on my first "proper bike. It was a gigantic step up from my Huret, which I believe was made from old bean tins
But yes, I remember switching from Huret to Suntour many years ago, and the improvement was dramatic. As it happens, I've just built up a new old bike on a Raleigh Royal frame, and I managed to get a Suntour Vx rear derailleur for £20 in almost as-new condition - and it shifts like a dream.