Many people still see gas power plants as a “bridge” to a clean energy future, with more than 88 gigawatts of gas proposed across the United States in 2021. Yet, fundamental economic shifts and the changing policy landscape continue to build momentum for “clean energy portfolios”—combinations of solar, wind, storage, demand flexibility, and energy efficiency that can perform the same services as a proposed gas plant. This update to The Economics of Clean Energy Portfolios (2018) and The Growing Market for Clean Energy Portfolios (2019) quantifies the trends and risks facing proposed gas power plants in 2021 by comparing every proposed gas plant in the United States to an equivalent clean energy portfolio.