This ought to get you stirred up.....
Is "in-house" overrated?
The posts are by folks with ETA movements!

All kidding aside, why do you buy a Rolex or Omega with 8500 caliber instead of a Tag? For the most part, all have similar accuracy. All fairly reliable. So, why? Why buy automatics when you have quartz? Quartz are way more reliable and way more accurate. So, why buy Rolex or Omega or Patek?
The point of buying a mechanical watch is that it provides a "beating heart" on your wrist...something that exotic...something that makes you feel special...something that is hard to imagine how 200+ tiny little parts could work in harmony to give time (and date).
Those who argue that ETA movements in their watches are just as good as Rolex, Omega 8500, Patek, etc. are missing the point. I can buy a very nice Citizen with finishes that rivals the best of Swiss...but is that what you're buying it for? Steel finishes? or are you buying Swiss because of the mechanical beauty that lies inside the case?
And if you're buying a mechanical watch, then isn't the mechanical movement the MOST IMPORTANT aspect of it? And would it be nice/special that the movement that you have on your wrist that costs THOUSANDS is UNIQUE to the brand, and not some off-the-shelf stuff that is present on a $500 dollar watch?
Call me an "in-hosue" snob...but when I spend THOUSANDS OF DOLLARS, there is no reason NOT to be a snob!

And for Rolex new calibers and Omega's 8500, these in-house movements ARE unique and HIGH PERFORMING over their ETA counterparts. Have cake and eat it too!