Kids are small and can squish in anywhere.
Any kid that can't fit in the back seat of a gbody needs a serious diet and a trip to fat camp.
If it's a woman trying to get you to replace the car it's time to replace the woman.
Gbody is safer for a young kid in a car seat than a modern car - no airbag to hurt them and bash the seat, and, thicker metal against a side impact.
Large 2 door coupe is safer for adolescent kids - no windows to unroll, no doors to open. They can't get out unless you let them out, but, without the inherent risks of entrapment should a child lock malfunction in emergency. The coupe is designed for back seat access through the front, a 4 dr.... not so much.
First car is irreplaceable. You kept it this long for a reason.
It's a 2+2 clone. They're a niche taste market for authentic examples, a clone would be worth less than a true one anyways.
I'd guess that ought to be enough for now