Eh, why shouldn't I be carefree at this point? Chances are very good I won't get it, if I get it, chances are it'll be mild, and if I get it and transmit it, chances are it'll just be to some antivaxxer idiot who will get very sick.
Yeah, I'll still wear a mask in the grocery. I'll still avoid eating indoors at restaurants. But the vaccine is available to everyone over 12 in the US, for free, and they're taking walk-ins at Kroger now.
No, I'll worry again when there's a new variant that's better getting through the vaccine than delta, but until then I'm sticking with carefree.