I see it as this. What is the useful end of life before requiring overhaul or replacement? How many of us go beyond 300,000 miles to see the end of life? Yes the engines work harder but putting the proper tool to the use is the key. My 2011 EB engine pulled my 7k TT just fine. Did it matter that it worked harder than the newer 5.0 Coyote engine? Maybe. Did that make a difference to me? No.
Either way I loved the power when needed and economy when it was there. Would I pull 10,000lbs? No.
So far I do not hear of these engines breaking down prematurely. It would be interesting to see the engine repair rates against normally aspirated engines that do not include accessories and appliances including turbos.