(note: the below is also aimed at others with similar questions)
U mean that HBC, cIOS and other stuff are still installed and workin?? after update??
Seems that Nintendo dont care about modding vWii... at least in that second sysupdate... bah..
Erm...it helps to remember the version history and the date.
WiiU's so far ship with the basic firmware (1.0.0, IIRC). Then there was the huge day 1 update, putting it to 2.0.0 (which allows to actually use things like the vwii). Shortly afterward, there was a minor update (2.1.0), which did some stability tweaks.
While it was known that many disc exploits for the wii did work for basic homebrew, things that could actually be considered
hacking of the vwii (basically: a HBC channel and cIOS for the thing) were only released
after the release of 2.1.0.
So please don't draw conclusions just yet. mysticwaterfall mentioned "Updating is perfectly fine
right now.". Chances are very high future updates will at least meddle with the HBC or cIOS to some degree.
@hundshammer: the interesting part is that those exploits were never truly patched to begin with (even smash stack was only dealt with in a half-assed way). I have no idea why not, but with each of them being available for years, it's impossible that nintendo didn't knew about it. So my guess is that they simply cannot fix it without at least potentially causing problems elsewhere. And that would mean at least the exploits will remain available, no matter what nintendo does (well...unless they seriously change their policy on the wiiu being backwards compatible).