Sorry this just isn't true. B-Die will not "make or break" a system. In fact the difference will probably go unnoticed in anything but synthetic benchmarks. Sure you wan't something that will run at least 3200MHz, but after that you start reaching diminishing returns. This is especially true with a 2000 series CPU and 4 series chipset, but even one recent poster has been able to run his memory at 3200MHz with a 1000 series CPU on a very limited motherboard.
I mean sure, if you're building a top of the line system with the best components, then get the B-die, they are the best. But if you're gaming and have a budget, for example, the benefit of putting the extra $50-$100 towards a nicer GPU will be much more substantial.
When I built my system I was worried about being held back by ICs and purchased B-die. I don't regret it, it's fun to be able to run 3600Mhz CL14 for benchmarks, but is it the best economical advice? I doubt it. Is it necessary to run 3200MHz or have good gaming performance? Nope. I had posters like Woomack and Johan45 correct me on this a few times when I was giving system advice.
It's like anything else, you wouldn't put a 9900K in a H310 motherboard, and you woulnd't put B-die in a budget system.