I should requalify for silver this summer and while it may not be the greatest I find it really helpful particularly on Delta operated
​​​​​ flights in the US as I get an extra baggage allowance, priority check in and priority baggage delivery. You also get a higher boarding category if flying in Main Cabin. For me those benefits are definitely worth it.

I avoid BA/AA like the plague as everytime the VS or DL experience is better including Delta Studio