audioman58,
I heard those giant ESP speakers back around 2000-01, and I liked them a lot. But, I knew it would be hard for them to succeed. The sound was beautifully balanced and natural, but it lacked the kind of WOW factor that is often needed to grab some listeners attention. It is very unfortunate that really good products cannot thrive just by being really good products--one has to please important reviewers, it has to have the right look, it has to be cleverly marketed, etc.
Crossovers, because they are hidden and utilize very old technology, don't have the appeal of fancy drivers where one can tout beryllium or other exotic materials, and all kinds of technological improvement. Capacitors, inductors and resistors, very boring stuff.