Bigger ones slipping through next? IIRC, the Chelyabinsk meteor wasn’t spotted until just a few hours before it struck. Less likely now, but still a possibility perhaps.
I’m not sure it was spotted until it burned on in.
https://freerepublic.com/tag/chelyabinsk/index?tab=articles
https://earthsky.org/space/chelyabinsk-meteor-exploded-over-russia-feb-15-2013/