They took it, they broke it, and now we can't use it properly.
[1] http://webapps.stackexchange.com/questions/73179/how-do-i-sp...
At some point Google Groups got really inconsistent, where it didn't turn up many, many postings and threads when searching for them. For some time you could find them if you tried several of their country TLDs (google.de, google.com), they brought up different results.
A bit later even that didn't work anymore, Google Groups has spotty coverage, at best.
Then they hid their advanced search interface. If you knew the URL you could still use it. Then they removed it altogether.
Nowadays you have probably no way to specifically search for something ("author:", "group:", "mid:"), nothing is working satisfactorily anymore).
It's probably also worth pointing out that before Deja News and Google were ever involved, a large chunk of Usenet came close to being lost [1] and significant chunks of it have been in any case. So it's not as if preservation necessarily happens in the absence of corporate involvement either.
I really really hate them for locking up this data (like so much its not funny, like major humanitarian crime imho).
Google is not the only party having Usenet archives. They are not even in any way special. They aren't the "official" archives, just as Deja wasn't.
If you're really interested in getting your hands on Usenet archives, going way back to the Ice Age, there are plenty of ways to do so.
Especially with the huge Hamster community (http://www.tglsoft.de/freeware_hamster.html), who are archiving almost fanatically, you should be able to get virtually everything you'd want just by asking nicely.
Other parties who certainly have archives are all the major news servers.
Tying it back to the article, you can't trust a company to do something in the public interest, or maintain that work in perpetuity unless you pay them.
Usenet is a limited example, a more impactful one would be Google locking down access to Maps, including all of the metadata contributed by the public. There's nothing stopping them from doing that.
What is the Hamster community? It sounds interesting. The link points to some software that could be used to help archive, but doesn't say much more (at least browsing around the Google translation of it).
It's comparable to sn on Linux: it acts as a reader, not as a "real news server" (IHAVE/SENDME).
So people could use it with their regular Usenet account on a dialup PC.
And since it's scriptable (alas, in some own script language), people extended it in lots of ways.
But others kept their "purple data" religiously.
Suppose Google had done nothing. The alternative wouldn't have been a beautifully indexed, easily searchable completely up-to-date Deja News archive today. It would have been that archive rotting in a landfill or that equipment being wiped and reused.
Has Google's stewardship of the Deja News archive been disappointing at times? Of course. But the idea that Google has taken anything away from you or anyone else reflects an amazing sense of entitlement and an astonishing lack of perspective.
The talk about entitlement completely misses that Google bought it only to prompty run it into the ground. If you do that in a market leading position to your competitors that's downright illegal in most jurisdictions.
That may not be applicable here, but you should be able to understand why this upset a lot of people.
This is exactly what I'm talking about. The idea that a company that is falling apart and selling itself off in pieces was going to donate one of its last major assets to charity... I don't even know where to start.
That was the whole problem. Running the archive wasn't a business (at least deja.com never figured out how to make it one and eventually gave up trying), but the archive ended up in the hands of investors and/or creditors that didn't care about that. You may be partially right - if Google hadn't bought them someone else might have (maybe Yahoo, AOL, Microsoft, or ...). I'm not sure about that (which is why the Google deal was good news at the time), but let's suppose you're right. All that would mean is that you would have ended up complaining about how some other buyer ran it into the ground. If you're going to make the case that Google got in the way of the Deja News archive's happy ending, you need a lot more than that.
In light of archivalship being a money loosing proposition for private corporations, it seems that we have the need for an internet/online library to have the right to copy/hold the entire internet in perpetuity for the use of future humankind - that's the mandate of the Internet Archive, and it would be great to see that codified in a UN resolution, for example.
On the other hand, it's not as if anyone (other than the Internet Archive of course) has exactly been stepping up to the plate. There's also the question of what a library is for these purposes and what do they have the right to do with respect to archiving copyrighted digital text and media.