I have to respectfully disagree that DL is in any way comparable internationally for an SFO based flyer. UA's nonstop TPAC offerings from SFO far surpass what DL offers one-stop via LAX/SEA. And SkyTeam options absolutely suck compared to *A. KE is simply not in the same class as NH/BR/SQ. TATL is a bit closer, but I still much prefer LH Group over KL/AF/VS. VS will only get you to LHR; nothing onwards. CDG is a transit nightmare.

Another current UA advantage is it has much better IT and cs availability. I'm frankly surprised frequent flyers aren't bailing on DL in droves given its inability to offer a functional app/website or to answer a call in anything less than three hours.