The Build Back Better Act (BBB), H.R. 5376 as the large social‑spending and climate package branded “Build Back Better,” never became law. It passed the House on November 19, 2021, but Senator Joe Manchin withdrew support, negotiations collapsed, and the bill’s status remained only “Passed in the House”, with no final enactment in that form. (en.wikipedia.org)

Later, Democrats negotiated a much smaller, significantly reworked package that focused mainly on climate, health care, and tax changes. This compromise was passed in August 2022 as the Inflation Reduction Act of 2022, using H.R. 5376 as the legislative vehicle but with its text substituted and the bill renamed; it became Public Law 117‑169 on August 16, 2022. (en.wikipedia.org)

Contemporary accounts and later summaries explicitly describe the original Build Back Better Act as having been effectively killed in the Senate, with the Inflation Reduction Act characterized as a reduced and comprehensively reworked successor that incorporated only some BBB elements and dropped most of the broader social‑policy provisions. (en.wikipedia.org)

Given Chamath’s prediction that “the Build Back Better bill … will never be passed; it is effectively dead and will not become law,” and interpreting “the bill” in the ordinary sense as that specific BBB package (not any later renamed, substantially altered compromise), the prediction is substantively correct: that original Build Back Better bill never passed Congress and never became law, even though a narrower follow‑on law using the same bill number eventually did.