This is a Nice move from Rivian and welcomed here (I imagine).
Rivian's 'R1 Shop' Lets You Swap To A...
Rivian will let preorder holders take delivery "in the next 6-8 weeks or sooner". Downside is, you'll have to drop your preordered model for any of the available models already built and listed in the 'R1 Shop'. This means you might not get an R1T exactly how you like it and will have to settle...
www.rivianownersforum.com