A commercial plane will most probably undergo through several maintenance events and checks during that sort of time frame, where cycling the power is part of the procedure.
It's very reassuring to know that it probably won't happen.
As other posters have noted, 248 days of operation means skipping twenty-plus maintenance and inspection cycles, plus missing one or more engine overhauls. That sucker's going to fall out of the sky due to a hardware problem before the software error gets the chance.
Even in the absence of regular, scheduled, required maintenance, there will be hardware failures due to stuff wearing out, with sufficient frequency to force reboots at less-than-eight-month intervals. Honestly, the FAA is going to ground any airline that was so lax as to get within six months of tripping over this bug.
That's not to say that this bug is a good or acceptable thing, nor that something like it couldn't have much more serious effects. But this particular error is a non-issue from a real-life consequences standpoint.