For now, before you board a 787 it's probably worth asking the pilot if he can turn it off and turn it on again
And, actually, as discussed on another thread, not being able to power things down for a reset is a challenge on 'modern' aircraft.
Back in the not so distant FE days pulling a breaker and resetting it would cure a lot of mysterious faults. You were supposed to use that superior systems knowledge to psychoanalyze the electrical system to figure out what relay would be unpowered on what bus etc., etc., etc...
Later, in the early glass days, inoperative computer boxes like FCC's would sometimes be cured back on the ground if you removed all power to the plane and started up again. The feds would also look the other way if, for example, you reset a yaw damper that didn't come online during start. You've seen it before and know how to fix it, no need to pull out the book, right?
Now, in this enlightened era of fly-by-wire and electric airliners, you don't touch a button in case of a fault until you've run through the QRH, then got a phone patch and done a kumbaya session with the dispatcher and maintenance. Which is probably a good thing given the history of creative systems analysis by flight crews. Even after you land, more effort often seems to be put into finding the right deferral code than fixing what might be a simple problem.
Anyway, stuff like a frozen ACARS screen in flight that in the past you would be expected to troubleshoot and pull and reset a breaker is now something that you need to document, advise the company and live with unless you somehow get special dispensation from somebody on the ground.
Sweeping language suggesting a general prudential approach in the preamble to the abnormal section of the flight manual has been replaced by paragraphs of CYA verbiage to insulate the company from liability if you make a command decision to try something not specifically authorized in the book.
So, it seems to me that increasingly, the pilot can't 'turn it off and turn it on again' even on the older aircraft.