Earlier quoted context omitted.
Sounds like maybe you're referring to Beyond Burger, not Impossible Burger? Impossible Burger isn't available in grocery stores yet, and Beyond has sort of a spammy taste to it that Impossible doesn't have (from my perception).
Impossible Burger has been available in stores in the SF Bay Area for what seems like a few weeks now, if not longer. I remember it because it's expensive compared to real meat. I got it at Safeway. It wasn't the Beyond Burger.
https://faq.impossiblefoods.com/hc/en-us/articles/3600190998...
I guess I'll look at some Safeways to see if I can find it, maybe it's in some stealth release or something.