No some valid points.
The hose integrated AI computers do not seem to be problematic at all, but then if it is on a hose, might as well have a gauge.
The hoseless versions do lose the signal due to certain factors, such as camera strobes. So probably not great for avid photographers.
My main computer is AI, but I also dive with a spare computer, mainly for liveaboard type holidays so I do not have to stop diving for 24 hours in the event of a failure. If my main computer failed, I would have a reasonable idea of my remaining air to within 10 bar. At which point I would abort the dive and then put a normal gauge on and continiue diving on my spare computer with a standard gauge.
I guess I just like to keep hoses to a minimum and it is nice to have all my information in one place on my wrist.
So I guess I would not agree that a gauge is required for redundancy but I do carry a standard gauge in my spares and dive with a spare computer to avoid missing dives in the event of a failure.
Each to their own and can't say that having a gauge attached just in case, is a bad idea, just not for me.
Daz
(Not much of a ruck, was it
)