I work in the lighting trade (live events). It's true that the stuff coming over from china in unregulated (dangerously) and of unreliable quality. We never use it.
Also - LED retro-fit is BIG business and R & D is relatively cheap, so every 6 months or so we take another big leap in the technology, e.g. dimmable units.. The ones developed as little as 3 years ago are now obsolete in my sector!
Altho this IS rather ironic.. as the european makes DO last forever, and that goes for domestic, "12v", and big wooshy stage-lighting..