People having issues with their engine blowing up is due to them driving it like a moron.
That statement shows that you know absolutely nothing about the
problem. So for the sake of clarity I'll explain it.
The Ecoboost engine was designed to be light, powerful for its displacement and economical. It is all of these things but in achieving these goals Ford compromised on strength and reliability, big time.
The engine was born with a few features which in and of themselves were not necessarily bad but put together made a recipe for disaster. Firstly, it has an alloy cylinder head. Secondly, in order for the coolant to get up to operating temperature quickly and aid efficiency, the cooling system employs a relatively low volume of water and last, there was no water level sensor in the coolant reservoir.
What set the barn alight for Ford was the last piece of the puzzle. They used a plastic connector pipe in the coolant system which was...a bit crap and was prone to crack. If it did, you lost your coolant and the first and only warning of this event you had was when the engine temperature went up. By this time you're past cause and into effect. Assuming you are Johnny on the spot and pick up on this immediately you have literally a couple of seconds to shut off the engine before the cylinder head warps and your engine is scrap!
Ford have already replaced upwards of twenty thousand engines because of this failure mode. Driving style has nothing to do with it. The work cost about £4500 and, even when under warranty, as of earlier this year, Ford had only covered the cost of about half of the replacements. If they could get away with it, they didn't cover it. I say 'as of' because I think they might be paying out now as there has been a lot of bad press about this. Not sure, you'd have to check.
Terrible, right? No, brilliant! As long as long as you were not one of the poor sods who had to deal with a bent engine because it's very insightful.
Imagine if Ford had not fitted that weak plastic pipe? Which they are now replacing with a stronger item. The cars would have been more reliable but the inherent vulnerability of this architecture might not be understood. Water leaks in cooling systems can happen in any car, especially as they get older. Clips rust, pipes rot, but typically, your engine will overheat, steam flies out but you let it cool down, fix the leak and normal service has been resumed. Not with an Ecoboost it isn't.
The damned thing is just as vulnerable to coolant loss as it always was, it's just less likely to happen now. But it still can. And if your car dumps its water for any reason, your engine is probably going to get trashed. And do you think Ford are going to take the hit once the car is out of warranty? No, I don't either.
So yeah, loads of Ecoboost cars running around and most of them will never have an issue. But.. You are driving a car that could destroy its engine should a relatively common, simple and usually minor fault occur. You want to drive a car like that? Knock yourself out.