I too continue to use both front and rear as if they were not linked - old habits die hard. And I can feel the ABS kicking in when braking hard, especially when pointing downhill with a weight shift to the front already because of the terrain. I understand the purpose of the exercise to brake just hard enough to not activate the ABS, but that's really difficult with the linked system. So I'm inclined to not sweat it too much.
I suspect there's a bit of traditionalist in anyone who rides a boxer engine, but I happen to think that ABS is probably one of the most significant engineering improvements in motor vehicles ever (reliable electronic fuel injection being perhaps the second, I don't care if I never adjust a carburettor again). At this point in my life I'm willing to admit, even marvel, that the computer is better at braking than I am.