Sure; I think that's a reasonable take too. I have no idea what their TTL requirements are or how frequently they update the ADAS database; if they're on the order of real-time, this seems like a complete technical constraint, if they're on a longer time horizon they might be able to offer manual offline databases.

I'm very curious at what level the restrictions operate. With every other manufacturer I've looked at, they're extremely coarse-grained; it's more like "is there a known long-time-horizon hazard in this area that is known to impair the system" than a "we mapped every lane and you need a database." I wonder if your I5 issue was a weeks or months-old construction area, for example. I haven't looked at Rivian much, though, and it could be totally different or extremely fine grained, there's no reason to suggest otherwise either.