My Walmart Discover upgrade took 4 years.
That's phenomenal, way to go! I'll cross my fingers that my cards grow as well as yours did!
The Chevron/Texaco does not seem to upgrade, ever. It might have years ago, but the CSR's I have called on three different occasions have indicated no path to upgrade, must be a new app. Read the horror stories on the forum about people trying to do just what the CSR's recommended and ending up with 2 store cards accounts. Very frustrating.