To me the biggest challenge in assessing impact is empirical question of how much any supply increase in meat or meat-like stuff leads to replacement of other meat. But this would apply as well to accepted cause areas of meat replacers and cell culture.
Decent discussion on Twitter, especially from @MichaelDello
https://twitter.com/brianluidog/status/1534738045483683840
To me the biggest challenge in assessing impact is empirical question of how much any supply increase in meat or meat-like stuff leads to replacement of other meat. But this would apply as well to accepted cause areas of meat replacers and cell culture.