Does the business card have these same privileges? (I wouldn't know, I get priority boarding due my partner elite status at AA, and I never check bags.) If so, the way to always have them would be to alternate personal and business cards (so that one is open at any time), or else keep one always open and only churn the other one. (Having a business card open does not prevent you from applying for one personal card, and having a personal card open does not prevent you from applying for one business card.)

The other question (which I have no idea of the answer) is how long after you cancel your "last" AS card do you lose those benefits? Ie, does BofA notify AS that you've cancelled the "last" card, or do they only update them once a year that you still have the card? If it's the latter, as long as you time your cancellations and new applications right (relative to the time of your that BofA updates AS), then it might not matter, even if you're only churning personal and never get the business card (or vice versa).

Btw, there are two nice benefits to the business card and at least one drawback:

• There is no Plat version (with "crippled" bonus) of the business card; you get either get approved for 30k bonus, or denied, no in between.
• BofA business cards don't report to credit bureaus, so you can spend more than 30% (all the way up to 99.99%) of your credit limit and not have it affect your credit score. Plus it doesn't count toward Chase's 5/24 for the same reason.
• OTOH, the business card offer never has the $100 statement credit aspect.