If your wife goes out of status or visa is expired/revoked/terminated, she goes home & you start from scratch with a spouse visa application. You need to ensure there's no chance of going out of status or violating regulations for any existing visa before starting AoS, or forget that, and maybe future visas, too. AoS has been taking 6-9 months, and can take longer. Used to be 6 months was fairly common, but now quite rare, and nine months or more seems to be becoming the norm. Spouse visa typically takes at least a year, often two.