Ahh the natives, Barry, the natives! See what you have caused?
Heh. If I was a troll, I'd be a damn good one, huh?

I see the thread got moved which is a bit of a shame because I really did want to get some DIR reasoning on my points, though admittedly I think I already got it and I'm still not convinced.
I suppose we're into the area where I can concede that the DIR guys have valid reasons for their configuration choices but I think there are also valid reasons for doing it another way. I think, for the diving I do, my reasons make more sense.
In my industry (IT) we have a way to spot BSing salesman. Ask them where their products are not suitable - if they say it's suitable for all cases you know they're just giving you saleswaffle. I get a similar feeling about some aspects of DIR.