Rolling the dice, and maybe having a continguency fund for a rebuild.
Have had my 2010 MY11 saloon since new and it's 8 years old on Monday (5th).
Has run with Subaru's Pro-R performance upgrade (340BHP/360Lbft) since May 2011.(4800 miles)
Had to have the head gaskets replaced and bottom end refreshed in June 2016 (47422 miles) as the heads had started to lift under boost.
In my case the ringlands were fine.
Not all suffer, seems to be a bit pot luck and whether the car has been run in properly and run sympathetically, or modified during its life.