Greetings, I am flying from CLT to SFO and decided to u/g with miles to first on the way over but not on the way back. I suppose I'll test my question. I realize that PHL or CLT to PHX are tough even for CPs to get upgrades on. As a Silver, I just treated it as lucky if I got an upgrade. As Gold I'm thinking it might be more frequent, but should I still not expect it most times?