What gets me with the blue light (sorry, a bit off topic) is... well, what is it?
I'll tell you what it is, it's a sales tool!
The first i3 I looked at was outside in broad daylight, but the next one I sought out was to test drive, and it just so happened the dealership had it stored indoors in a somewhat dark warehouse/garage space. And the sales guy -- well, he knew what's what, because as we walked up to the car he hit the magic unlock button on the FOB and that fantastical blue glow filled the cabin and I was instantly awed: I want to own this car!
I ended up not buying that car but one at a different dealer, but it didn't matter, the impression stuck.
But now, when do I actually get to enjoy that cool blue light? Not often. I usually leave the FOB alone in my pocket and unlock touching the door handles, so no blue light show for me. And in the event I do click the remote, the blue glow times out after maybe 5 seconds.'
So when do I "use" the blue glow? Gotta be at night, gotta be walking with somebody or somebody nearby who I want to nonchalantly show it off to, but they'd better look quick or they'll miss it. (Really, it only gets noticed by my kids, I think.) No, if I'm chatting with a coworker in the parking lot IMHO that blue aura should be present the whole time. What's the point otherwise?
Oh, and why strip this off the Deka cars? Inexpensive to install, and maybe it'll result in another sale or two, maybe just because somebody on the street noticed it and it made them look at an i3 in a "different light" (pun intended).