There are other undocumented benefits. Lack of harassment is a big one,
@Tanks. Of the four flights in-out of Africa, the worst is the outbound Chicago-Dubai. It’s long, then a 14 hour layover. It’s also the first leg so they scrutinize everything for overweight rules. My collapsible duffel I carry on, and my son’s back pack, are allowed by rule if they are 8lbs. No exaggeration, we’ve carried them on when they weighed 60-80lbs. Fly biz, at least for the first leg, they don’t harass you for weight and measure stuff. They also don’t ball-bust me when all my checked bags are 50-ish pounds rather than less than 50lbs.
If you’re flying cheap cattle class, the occasional cash upgrade to business can be handy, so too can be the points upgrades using an Amex for another leg. A little bit of business breaks up the pain of two full days of travel in coach.