You forget, the Micro was a complete failure. Nintendo set the release price too high; when compared to the DS the Micro just wasn't worth the price tag so hardly anyone brought one. (I say this as one of those people; I only wanted to upgrade from a no-backlight GBA, but an extra £20 could get a DS which would be supported for at least another 5 years). Most of the Micros sold have been brought from bargain bins, years after Nintendo discontinued them and wrote the line off as a failure.
So you're trying to back Nintendo up, by saying Nintendo made it a colossal failure to begin with? I fail to see the logic...
There are 3rd party car chargers out there (I have one from an accessory pack, never tried it out though). As for lack of faceplate changing welcome to Europe; they even removed all mention of faceplates from the instruction manual over here.
In retrospect I was a bit hasty there... I've since found a few on ebay that I now have bids on
But the lack of a GC to GBMicro link cable is the most heinous atrocity ever committed by Nintendo. Even standing beside the VirtualBoy (Hey, I loved that sickly thing).
IMO, the gameplay of GC to GBA with Four Swords Adventures is something the industry needs SEVERELY right now... truly good multiplayer with at least *some* depth, and a unique method of play. Nothing like running around in the overworld with everyone on screen, then have people drop to their own screens for dungeons... truly cool.
I'm even researching a method to make a link cable that will even CHARGE the Gameboy Micro while it's being used to play GC to GBA games... but that's going to require a LOT of work and rewiring.