A big advantage in business to me is that it's usually only two seats next to each other. That also no risk of middle seat. I've yet to experience lie-flat seats in business class. Even first class on many planes doesn't have that.

What risk is there of a middle seat if you are choosing your seat?

While I do enjoy my automatic C+ upgrades at time of ticketing because of status on Delta, I’m short and average size so main cabin doesn’t really bother me especially if I can get an exit row seat. It wasn’t bad flying nine hours to London two months ago.