I know the production has stopped... did I say somewhere buying a NEW Wiiu :-)
It is just that the Wiiu is the last console capable of playing almost the complete ninty catalogue (if you hack and pirate a bit) and if my wiiu breaks down from like a powersurge, nand corruption (which can happen) or whatever, I then have to find a 5.5.1 console.
Being that Job Public just isn't aware that ninty upgraded their consoles last week, chances are that future offerings of wiiu's on online marketplaces will be 5.5.2.
Over here game stores and cash-converters will check the wiius they receive, erase them complete and in the process upgrade them.
in other words: unless of course 5.5.2 is hacked, finding a 5.5.1 in the future could be either difficult or pricey (if seller knows what he has)