I NEVER say, "I'm good" (but I don't go into a 5 minute long saga unless I don't care for the person & personally don't want them to ask me ever again... but that back fires sometimes).
Usually I answer with a 2-liner. Example:
"Aside from the COVID-20 I've gained, my wife bringing a new dog into our family which I swear is my narcissistic mother-in-law in the form of a dog, and still keeping it a secret that I'm a Giants fan... seriously, doing great!... What about you?"
Half the times I still get "I'm good"... but the other half of replies are ACTUALLY INTERESTING & SHORT.
I have drilled it into my boys' heads that if I (or anyone) asks that question, "...I swear to God you'll be doing push-ups until your arms break off if you say 'good'. Don't be long winded but you'll also NOT be lazy, boring, and lack any ounce of frick'n creativity." I've had parents and teachers come up to me and say, "Oh my God, I LOVE how your boys respond when I ask how they are doing! I ask them almost every day!" ... I'm sure my boys are worn out coming up with sh**