I was doing some looking and found some pretty cool things about the Ecoboost engines. There have been several going 200,000 and even 300,000+ miles (odometer) on the factory Ecoboost (no catch can or anything) -- just regular maintenance, quality oil.... Also, these engines are TOUGH... going through pretty grueling torture tests with NOMINAL carbon deposits (no significant coking on one of the tests and this being without a catch can), no leaks or signs of significant stress.
Another test 'simulated' 10 years and 165,000 miles of engine wear that also involved a dyno and tear-down with inspection. The results were that the 3.5 Ecoboost tested was still within manufacturer's specs, with 364hp and 420 torque (just one hp less that factory)!
I think the takeaway here is maintenance.
I am really excited about my new Edge, and now I'm confident that so long as I follow the owner's manual for service (or even a little sooner than the manual says), I should have a very reliable and fun vehicle.
Sources:
http://www.carbuzz.com/news/2017/1/2/How-Does-A-Ford-EcoBoost-Engine-Hold-Up-After-200-000-Miles-7737127/
http://yyjk.yangtaozhan.xyz/FMASAInlWtc/Ford_s_Beat_to_Hell_and_Back_3_5L_EcoBoost_The_Tear_Down_/player.html