Jensen didn't talk about it. Maybe he knows it's embarrassingly low. Everyone knows nvidia won't give us more VRAM to avoid cannibalizing their enterprise products.
The official specs for the 5090 have been out for days on nvidia.com, and they explicitly state it's 32GB of GDDR7 with a 512-bit bus, for a total of 1.8TB/s of bandwidth.
This feels like a weird complaint, given you started by saying it was 24GB, and then argued that the person who told you it was actually 32GB was making that up.