Why aren't component active XOs more popular?

I'm in the prosess of going to an active system. But will be fall time before I get it all together as I will also be rebuilding and modding my Maggies MG III . I just got a sweet deal on a Marchand MX-44 X-over, I Almost stole it. They are for sale in kit form if one has the need. But my was built by Phil Marchand. I'm learning by the ones that have gone before me with similar equipment, so it is much easier for me as they have their systems dialed in already so I pretty much copy with a little bit of fine tunning to dial it in. Suits-me I don't know if you have heard the same speaker in passive then active but I have and there is no contest the active is far superior and the passive that used to be in was a tweeked out one. I think it is not more common because because there is more work involed and some what of a learning curve and the process can to some seem intimidateing. It is not part of the plug + play world that seems so popular these days.

Suit-me with all due respect my wording in my post good have been more clear. I have limited knowlege when it comes to X-over but I am open to learning. I realize there are some speakers that would be diffacult to go active with and could be far to much trouble in the end. But I would think that a good many it would benifit if done properly which at times can be a tiresome task but worth it. The speakers you gave examples of are fine speakers indeed but you didn't give an example of a speaker that you heard in passive and then active and that was my question. I have heard 3 in active but only 1 did i hear it in both modes and that was Magenpan MG IIIa which are very simular to mine and is the reason why I am going to active it has made a very noticeable differance in my friends system. He used to have a set of Dal. DQ 10 in active and as a 5 way speaker I would think not easy to set up as he set it up as a 4 way and sounded pretty good as I used to own a pair of stock ones. I am some what Dollar challenged because of a disability and have a fixed income. Most of my system is older used but desent gear and I am just looking to get the best out of what I have. As I have extra gear (don't we all)my only needed gear was a X-over.For now the ribbon will be kept on passive but upgraded. I will upgrsde my amps when funds allow (tube or class A ss)for the top. But back to the thread as someone else said you don't see x-overs for sale often becuase people just don't part with them. I've been looking for a while for a desent one i could afford. I found the Marchand XM 44 up here in Canada for $ 400.US. I seen your thread on AA resently about going active with a sub. Interesting read, Thanks for your thoughts. benie