Would people have the same atitude if Karoshi cost money or the Cutter Project was more that just managed service charges?
Though I'd make the same arguement for/against Karoshi that I did for CC3; if you want just about everything it offers and can't put it together yourself with the resources to hand then go for it. If you can and will be customising whatever baseline you get quite heavily because none of them quite meet your needs then they all start to look like poor value (even Free software, unless your time is worthless).
We spend far to much time fighting CC3 where I am, because we're trying to go in a different direction from the direction it wants us to go.
I've actually just distributed a paper at work discussing "the future of our network" where I talk about things, and I describe our use of CC3 as trying to fit a square peg into a round hole. And as I pointed out in this paper, it isn't the fault of either the peg or the hole that this doesn't work.