Yes, learning the system is a very good thing. It's just that there's more of it than I'm willing to learn about.
To me the FLUs are working machines, not something I bought to travel pavement with, so a functional work light or two in each end is all I need, should darkness come before I'm done. Oh, and dash lights are helpful, too, to keep track of the wellbeing of things. And the wipers, heated windshield, and heater are nice to have.
As far as indicator lights and such go, I see no need for them. It's bad enough that my pickup tells me that I opened the door. If I pulled the PTO lever, turned on 4WD, or something similar, I really shouldn't need a light to tell me that I did.
And if I do, I think that I have no business operating that machine.
Never did give market value much thought. Okay, none. I modify my SEEs as "needed", to make them work better for me.
Although, I keep the mods (if any)easily reversible on the more rare FLU variants. It just seems wrong to change those around.
These are, of course, my personal and opinionated views. And as you know, peakbagger, I'm not a fan of buing a SEE, for example, only to turn it into a basic Unimog by removing it's main features. I know why people do it, but that doesn't mean I like it.
At the risk of upsetting most everybody here, I should mention that I bought work-machines, which happened to have Unimogs holding the implements on. But now that I have them, I must admit that the quirkyness of the FLUs has me spellbound.
Okay, I'm off my soapbox, let the hate mail begin.