OP mentions that husband is AAGold for Life. Correct me if I’m wrong but that’s only OW Ruby do priority checkin is aboutbthe only benefit.

it is a start though and you could see how far away he is from Platinum for life and work to that while also trying to get your status in the interim. If Platinum for life attainable in a short time, provided you are travelling with him you’d have all the OW Sapphire benefits (Boarding, Lounge Access) once he gets there and you may then want to reevaluate and decide if you want to chase status with another alliance to expand your options and give the two of you perks in more than one alliance and expand your travel choices.

there is a “cheat” to Star Alloance Gold by only taking three Singapore Airlines or Sil Air Flights in four months. This is through Amex Platinum giving you Jade level Golden Circle status in Shangri-La hotel program. A status match can be had through linking that with a Singapore Kris Flyer account which will get silver Level. After the link take 3 flights with singapore in 4 months and you will get Gold which translates to Star Alliance Gold (lounge access, boarding perks etc). You and hubby would then have two alliances to broaden your travel choices with perks for both, at least for a year.