Here's another thought... Those brands were trying to market to the 'cost is no object' segment of the market. I think we can all agree that is niche at best.
Unfortunately when companies like that try to go down market, consumers are worried that the products will be greatly cheapened and stay away. Look at Marantz, Harmon Kardon, etc. They tried to go 'mid-fi' to get a broader market share but still wound up on the ropes and fodder for raiders.
It's a tough game! There's a few names have have managed to keep afloat, like ARC, MacIntosh, VPI, etc but even they have had to acknowledge the realities of the market. Look at ARC's new line of down-mid market components. Not everyone, or even many, can afford $90k for their new flagship amp...
Happy listening.