Well, there are always going to be people who have strong preferences for certain tools, which doesn't make them either right or wrong.
Lencarta has a lot of customers who've bought into the Quadlites for still photography and apart from one woman who sent it all back because she thought it was too complicated to assemble the softbox, everyone seems to be happy with them, judging from the repeat orders.
I'm a studio photographer, so I'm a control freak - I want every part of the lighting to be under my control, and it's probably because of this - and because I don't care how much I spend on lighting - that I use flash. Different people have different preferences and attach different levels of importance to these things.
There are plenty of people around who just don't get it as far a lighting is concerned. With apologies to 'Animal Farm' these tend to be the people who believe in "Soft light good, hard light bad" and who seem to think that it's all about quantity of light, not quality - so they buy themselves the biggest softboxes they can find, or the cheapest umbrellas, stick them on flimsy stands and blast their subjects with light, totally ignorant of what can be achieved by the careful creation of shadows. For people who don't understand light, or don't think it matters, or who won't spend any time sculpting the light, then it would be a waste of time, effort and money to get a studio flash system that allows fine control - they may as well use hotshoe flashes or fluorescent lights, with the ISO turned up or the aperture opened up.
Some of the products on the Lencarta website were lit with the Quadlight, although most were lit with flash. IMO (and that of Advanced Photographer, who awarded it best in test) it's streets ahead of the competition and I'm perfectly happy to use it with simple still life subjects that don't require fancy light shapers, and if flash wasn't available to me I would use it more.
A week or 2 back I watched a TV programme about David Bailey. I don't think it was all that accurate (I don't remember him being that polite and well spoken in those days

) but the thing that they did get right is that they showed some of the old and horrible continuous lighting that we had to use back then. Although he was perfectly capable of turning out top quality work with them, Bailey was one of the very first people to move away from the stilted poses and long exposures that a combination of low powered continuous lighting and large format cameras imposed on fashion photographers of that era, and use grainy 35mm film and whatever lighting happened to be available. He moved on.
The Quadlite is streets ahead of the old, hot continuous lighting and if you can live without the choice of light shapers that flash gives you, you can manage. And if you like shooting with the lens wide open (or nearly so) then it may even be better for you - but personally I'll stick to flash
