Love the thread and your idea Pairs.
But I have to disagree, some of the richest traders in the world, don't use a pairs trading concept, nor do some of the best performing Hedge Funds.
Let's look at some of the best known (and wealthiest) traders: Paul Tudor Jones 2, uses t/a.
Stanley Druckenmiller and George Soros are two great traders, with billions to their names and aren't statarb, but global macro and Druckenmiller uses t/a himself.
Then you have Victor Niederhoffer, who is/was one of the leading experts on the subject of statarb from what I am aware, with a fund of which blew itself up.
I wouldn't keep referring to 'the pros' as those who spread trade. It is just one form of many methods which can see significant profits and similar risks IMO.
Agree on break-out trading though, most of the time.