It's just the high end stuff that's coming in 19"+ now, and it's bc even family sedans come with 18" wheels now so any upgrade is going to be 19"+. It does suck for us but the NSX market is already tiny plus I don't see many NSXers buying these type of wheels anyways. Most gravitate towards purposeful, widely manufactured Japanese wheels and not bespoke auto jewelry type.
Because the Lambos, Porsches, Audis, and Ferraris are all about the sedan auto jewelry type..... Lets try not to pretend that only Japanese made wheels are made with purpose and everyone else out there is all about bling only minus any performance. You are partially correct but there are plenty of wheels out there I would love to have that arent made by Assanti Wheels but just dont come small enough.