Why the sudden, seismic shift in the metagame?

[ElementalDearWatson]

I generally farm Gold, because I find it more fun than Platinum.  I'd noticed that Shard Of Wisdom decks were becoming very common, maybe as many as 1 in 5 decks.  I had a deck which I used primarily for AI4, but which I realised with the metagame as it was would probably work really well against Gold, so I started using that and got a pretty good win rate, something like 7-8 out of 10.  After a few days of using this deck and getting good results I thought I'd gather up some statistics and post it in the Farming Statistics thread, as I was sure it would beat all the decks in there in terms of win/lose ratio, although not in terms of TTW. 

So I get up one morning, 2 or 3 days ago, and start using the deck while recording all the relevant statistics, only to find that the win rate had dropped to about 50%.  After about 40 games it occurred to me - I'd not faced a single deck which had a Shard of Wisdom.  And I still haven't.  Not one.  It literally went from something like 1 in 5 to none at all overnight.

While you'd expect changes to occur in the metagame - once Shard of Wisdom decks become common, decks which work against them will also become common and so people will stop posting Shard of Wisdom decks - but such a huge change literally overnight seems unusual.  Is it just the way that it worked out (with a little help from the RNG choosing which decks I fought), or did something happen which caused lots of people to simultaneously change strategy?

[RootRanger]

I really, really doubt that it went from 20% to 0%, especially not overnight. The idea that every single SoW deck, of which there are a hundred, would be taken down on the same day without any new SoW decks replacing them, is clearly absurd. Your observations can be chalked up to RNG and maybe a bit of confirmation bias, which is a far more likely explanation.

[ElementalDearWatson]

Confirmation bias and RNG is my primary hypothesis, too.  But I've been playing quite a lot over the last week or two (maybe 100 games a day) and I've gone from having a specifically anti-Shard of Wisdom deck regularly winning 2-3 special spins in a row to having an about 50% win rate.  And I've not encountered 1 single, solitary deck that uses Shard of Wisdom for days, now.

Given that, asking whether something trigger event I'm not aware of has occurred seems legitimate.

[Higurashi]

My alt certainly is a SoW deck, and should be in first spot judging by the win:loss (but isn't). You'll always find a large variety of decks in Silver and Gold because the players can make any decks (unlike Bronze) and a lot of different deck types can get first (unlike Plat).

[ElementalDearWatson]

Yeah, it must have been a fluke of the RNG, as it's back to loads of boring Shard Of Wisdom decks now.