Of course there are the Wiggins types in this world!I know someone who does a 70 mile round trip to work on a normal bike, but he doesn't do it every day. I also know someone who does a 35 mile commute every day on a normal bike and has clocked up over 11,000 miles so far this year.
Having said that 400 miles on an S-pedelec is a big ask.
I have not got the impression that anon. is one of them
But hey, I laid the eat me own hat challenge so if he is driven.... Well, its possible just not very sensible or practical in this instance
I would totally respect the massive effort it would take to prove me incorrect!