On a plus note we would become an attractive proposition for Netflix following up with their Sunderland til I die documentary series. With Warnock at the helm half time team talks would prove worthwhile as well.
It would be great to see the Gazette put a positive spin on relegation as well.
Going down would absolutely cripple the club in many aspects, none more than financially.
Season ticket sales wouldn't be any more than 10k.
At least this forum would be relatively quiet if we were to get relegated.
And that the teams below us are in better form than us.
As to the original question. None. You wouldn't be asking it about another club being relegated, because there is no bright side. You are only looking for any positive because it's Boro. It would be awful, possibly financially catastrophic.
There are none. It would be a disaster for the club in my opinion.
Remember how easily we were (twice) going to bounce back to the Prem? We'd just become a League 1 club and struggle intensely with a poor squad and no money even if we did manage to get back up.
You could argue that we've been meticulously planning for League 1 for 3 seasons now, so it's positive that we will reach our goal. Maybe the top brass will now show the desire and skill to set a plan to make us better.