BOS-BNA Delay

Currently on a plane from Boston to Nashville that has been delayed after boarding. (Was already away from jet bridge when I guess a maintenance light came on. Had to taxi back to jet bridge, then needed a fuel top up. Now, captain says “performance numbers aren’t coming through but they’re working on”

I know nothing about planes. What’s the likelihood this plane is taking off if that is the problem?

Currently been sitting on the plane for 3 hours.