You'd rather pay less and hope that the software AND hardware isn't faulted? As far as we know today, there could be hardware-level problems as well if PCIe 5.0 is struggling. And who is getting 5090's at MSRP? There is no guarantee on 5090 pricing, and with availability being a problem for as much as 16 weeks, tariffs aren't your problem my friend.
Tariffs are a living policy -- nothing was ever set in stone, as is apparent as now both Mexico and Canada have them delayed for 30 days. China is also set to have formal talks with the U.S. on this soon.
Sorry but Dementoss is right: there's always a risk as an early adapter. Some decide it's worth taking, which is fine -- just realize it's there. Same for the 9070 (XT) at launch, though AMD obviously isn't in a hurry at all to rush it out the door, thankfully.