This article cannot be generated because no source documents were provided for citation. The SOURCE DOCUMENTS FOR CITATION section is empty, and the hypothesis reasoning contains claims that require verification from actual news sources, financial filings, or official statements.
To write this article properly with inline citations and a sources footer, please provide: verified reports about Rivian's 2027 profitability target changes, official announcements about the Uber-Rivian partnership, financial data on R&D spending, and statements from company executives or regulatory filings.