The problem with using many SR Pokes is: why bother? SR is so easy to set up, and spinning is not terribly efficient so it's usually more effective to have a Poke that doesn't lose half its health when it switches in.
		
		
	 
You 
should bother if that Pokemon fills a special niche in your team that nothing else can fill. 
Note that SR itself is set up by bulky Pokemon who have no form of recovery, so they themselves have trouble switching in. (Do people use Aero in the same manner in UU as a suicide lead? That's one exception.) It takes just as much effort to 
lay down the rocks, and when the spinner comes out, all of that work is to waste. So yeah, you can lay them down on a switch, but what if they switch in something powerful that can set up while 
you run?
But again, I should have bolded the part where I mentioned that I'm not here to argue about the move SR, but how people treat it in relation to a Pokemon's viability. Not the move's.
 
	
	
		
		
			Sorry but I think you're both under selling SR. As Cynthia says Stealth Rock is so easy to set up, and UU doesn't have a particularly great pool of spinners since a significant number are either weak to SR, or troubled by Rotom/Froslass the two most common rapid spin blockers.
		
		
	 
Again, my point was 
not to argue to viability of SR. My main point was to speak against people looking at a Pokemon and immediately saying "LOL SR WEAK" without paying any attention to its stats, movepool, etc. It's ludicrous, really.
Let's return to the most extreme example, that of Ho-oh for OU. It was astounding to note how many people were willing to ignore 106/90/154 defenses complimented by access to auto-heal, its signature move being a 150 BP STAB move with a 50% burn rate coming off 130 Attack to cover up its weaker defense, and decent enough Special Attack to punish any "physical" wall that comes its way, 
all for Stealth Rock. Sure, there were others who bothered to at least look at something else and note its "slow" Speed (well, not for those defenses), 4x Rock weakness, and made a correlation that fast Scarfers with Stone Edge could beat it, but by and far, the majority made that poor mistake and argument.
 
Yes, it's bad to have a 4x SR weakness. And yes, it's bad to not have arguments specific to UU. But I'm only reflecting the attitudes of some of you, who are willing to ignore everything else just to note that. While other Pokemon may not be as extreme as Ho-oh, the attitudes are just the same. A Stealth Rock weakness should be a footnote, not the main argument. 
 
I feel the same attitude about Pokemon who can set it up. Not every Pokemon who learns Stealth Rock is "amazing", and none are "overpowered" solely for the ability to set it up. Such is the case with Steelix.
 
	
	
		
		
			I certinaly hope when NU/equivalent is formed there is some serious consideration of it being banned.
		
		
	 
Actually, it already is banned. Or at least functionally.
 
	
	
		
		
			When does the BL and UU testing period begin?
		
		
	 
When it gets to that point in the policy review, although iirc UU is near the bottom of the list. 
However, in the meantime, I've been thinking that maybe we can hold a tournament or something while we wait, so we can maybe get a headstart? What do you guys think?