I'm making good progress on learning to breathe to the right ( my 'wrong' side). I can now nearly always swim a 25m length breathing only to the right, usually breathing every six and sometimes every eight, depending how I feel. If I run short of air I sometimes sneak a quick breath more or less involuntarily to the left. As yet I haven't tried a whole 50 breathing to the right, but I'll definitely try it soon. Strangely, or perhaps not so strangely, the whole stroke feels quite different when I'm breathing to the right. My feet particularly feel different and I get the impression that my kick is busier. More practice will be needed to detect what's going on.
I think bilateral breathing is a worthwhile skill to develop and probabnly good for both body and soul.