Actually, what Bob presents in the videos (I mostly watched the second one), is nothing new per se. Back in 2014/2015 when teaching various Speedlite workshops, he mentioned the idea of redundancy. For what he does (weddings), that makes sense. i.e. having two camera bodies himself, having a second shooter, on-site portable drives to copy cards to, and two different systems to control the flash (built-in as well as either Pocket Wizards or Radio Poppers).
But even at the time, I didn't go down the path of having a redundant wireless system since I didn't need it for what I was doing. Even now, I don't do any type of event work. But, even though I can take my time to set up a shot, as with others, it became extremely frustrating to have communications drop. And sometimes drop very often (sometimes at least once per minute).
When looking for my next lighting system last year, the Canon EL-1s were $1,000 each. Almost double that of the 600 series. And even though they had some nice improvements, the guide number was the same as the 600 series. The investment I did with AA rechargables would also go out the window since the new flashes were powered with different batteries. And then of course the wireless issue. So if having to add on a redundant system, the price per flash now increased.
The only con (though very minor) with my new system of lighting is that the strobes are larger than Speedlites, So I cannot place lights in certain areas (e.g. hidden within lamps). Though honestly, I've not had the need to do that in the past, so is something I won't miss. Still, the possibily of hiding Speedlites in small spaces, was a nice attribute.
But, having a solid wireless system these days, modeling lights and so much more power output is solving all my needs for lighting.
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Ricky
Camera: EOS 5D IV, EF 50mm f/1.2L, EF 135mm f/2L
Lighting: Profoto Lights & Modifiers
