Originally Posted by
jmanirish
If he starts flying LH/LX/SQ/NH in First, he'll quickly forget what GS even meant, and will regret not doing it sooner.
The big benefits of GS he'd be giving up are PN space for upgrade certificates, and the award ticket benefits (opening up saver space for a companion, T to XN, GPU on award ticket). If he doesn't use these, then whatever good treatment he enjoyed on UA he will get and then some flying paid F on those carriers.