Priority Pass is a real thing that isn't Delta related.

I'm assuming you're talking SkyPriority, which is nice to have. But if you're flying domestically to random outstations, it's not of much help. There's no priority security lane at most airports, thinking GNV, SDF, OMA, etc. At ATL, JFK, SEA, yes, but otherwise no. Baggage, meh. Boarding, meh.