hmm 8-9 years, id probably change the bike.
Seriously tho I would change the fork too, my spesh fork recommends replacement after 3 years and carbon from 8-9 years ago wasn't quite the material it is now due to manufacturing techniques etc.

Id probably change the post too if its that old, just because its al doesnt mean it wont break. Years of scratches and the odd big hit can cause fatigue, if you have the money i'd be on the safe side.

Having said that its a question of odds, and its likely that if tested, both parts would prove to be good. Its just that you dont want to be the test dummy