Ok Alan, but then explain to me why the Arrows are the oldest running cars on NJTransit's system. Why SEPTA uses EMUs almost exclusively, and LIRR and Metro-North use them substantially.
If MTA can make EMUs work, why can't Amtrak?
It's not a matter of getting them to work, it's a matter of the right tool for the right job. In the case of commuter ops, despite NJT's past contentions that now seem to be changing, EMU's are perfect for the quick accelerations/decelerations that are needed with stops on average 2 to 5 miles apart.
You don't need all that distributed power, extra weight, and extra cost in an Acela replacement.
At least in my opinion and I'm far from an expert on this.