If you already get priority boarding, shortcut security, and 2 free checked bags from the credit card, that’s most of the big stuff right there.
Silver mainly adds things like free seat selection (at booking), maybe earlier access to better seats, and some small extras like points bonuses. If you’re already paying for seat selection a couple times, yeah, it could pay for itself fast.
But if you usually just take whatever seat or you don’t fly Spirit that often, it’s probably not a game changer.
For a trip with two legs next Sunday, it might help with seat selection right away, especially if you care where you sit. Just don’t expect it to feel like a full service airline suddenly.
And yeah… no WiFi included is very on brand for Spirit.
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