to be honest, the only reason i care about having a fob that works is because it allows me to get into the car while it's raining without fumbling for my keys. In the end, if the keyless entry system just went into the toilet I wouldn't care about that either.
I do mods based on what I get enjoyment out of. I care very little about what my fob looks like (other than i don't want the plastic case crumbling in my hand) and don't care that it says Cadillac on it or that it's a 15+ because it's "sleeker" or so that someone thinks I'm driving something newer. In my world, modifying or upgrading my key fob is a waste of my time and my money and brings 0 excitement for me.