Nolan’s vision specifically accounts for film. He’s been very vocal that the most accurate way to view the movie as he envisioned it is via 70mm IMAX.
“For Nolan, the “best possible experience” to view “Oppenheimer” in theaters is the IMAX 70mm film presentations.” [0]
I think I’ll watch it as the director intended it to be watched.
[0] https://apnews.com/article/oppenheimer-christopher-nolan-0f8...
For someone (like yourself) who is aware of and interested in the differences in presentational formats, it does suck that formats like IMAX 1570 have very few locations around the world (heck, that's even true of IMAX GT). But it wouldn't be any better for you if those formats just didn't exist at all!
Perhaps one could argue that, because the IMAX GT exists, Christopher Nolan is making filmmaking decisions that compromise how the film will end up looking on more traditional (e.g. 2.39:1) presentational formats. Or in other words, one might argue "Oppenheimer would look better on 2.39:1 if Nolan had shot it specifically for 2.39:1." But I tend to think that Nolan probably realizes that the vast majority of people won't see it in IMAX, and I doubt the compromises are significant.
The main advantage of digital in cine is that you can shoot and reshoot without dealing with the cost and logistics of film. But it’s Nolan’s summer blockbuster in IMAX format, I think they’ll be alright.