I think I broke my dewalt XR hammer drill (DCD996) using an 8.25 in hole saw

So my drill chuck completely seized up in the open position after using this giant hole saw. The drill was struggling to push through drywall with this thing. drill was kind of old and beat to shit to be honest, but I need to make another hole and I’m scared to use a new drill now with this hole saw. So what’s the take from this community, was it the hole saw that caused my drill to break or old age?

So my drill chuck completely seized up in the open position after using this giant hole saw. The drill was struggling to push through drywall with this thing. drill was kind of old and beat to shit to be honest, but I need to make another hole and I’m scared to use a new drill now with this hole saw. So what’s the take from this community, was it the hole saw that caused my drill to break or old age?