You don't have problems with that in BM. BM does simply not feature multi core so the potential problems simply can not arise. (nor can you fake around that, the GC will simply break if you think of beeing the cool one with one of those "multi threading" modules floating around)
But the main pro of using that way is the heavy drawback of the "old" method they mention: the old method is simply not capable of handling modern CPU correctly which use dynamic stepping. (I'm only on notebooks so this is a serious aspect for me not a funny side feature. I hate crap games that suck 100% cpu and stuff like that but run still normal when GPU fully stepped down as well as cpu fully stepped down)
But the main pro of using that way is the heavy drawback of the "old" method they mention: the old method is simply not capable of handling modern CPU correctly which use dynamic stepping. (I'm only on notebooks so this is a serious aspect for me not a funny side feature. I hate crap games that suck 100% cpu and stuff like that but run still normal when GPU fully stepped down as well as cpu fully stepped down)