Good question! There are many people who are trying to understand how to significantly increase the pace and scale of prescribed burning in the US. The National Association of State Foresters publishes a regularly updated report on the use of prescribed fire across the US. In the 2021 report that was just recently published (https://www.stateforesters.org/wp-content/uploads/2023/01/2021-National-Rx-Fire-Use-Report_FINAL.pdf) they identified nine impediments to the use of prescribed fire: capacity, weather, air quality / smoke management, resource/funding, public perceptions, liability/insurance, permitting/legal concerns, WUI/population growth and agency/landowner priorities. The report provides a bit more information about each of these categories, but it’s likely that limitations vary by region and locality.