Could the main difference be that TBP is a simple process change with reduced costs, while EA-style giving would fundamentally alter grant evaluation requiring more overhead from the funder.
I also think EA would involve extra costs to existing grantees, they will have to provide more evidence of their effectiveness or lose out to orgs that have those systems in place.
Separately I think it will be very hard to get existing foundations to shift to use more EA frameworks unless their main donors become interested in it. There is probably more to be gained by finding and helping the UHNW people/orgs that are inclined towards EA already.
Could the main difference be that TBP is a simple process change with reduced costs, while EA-style giving would fundamentally alter grant evaluation requiring more overhead from the funder.
I also think EA would involve extra costs to existing grantees, they will have to provide more evidence of their effectiveness or lose out to orgs that have those systems in place.
Separately I think it will be very hard to get existing foundations to shift to use more EA frameworks unless their main donors become interested in it. There is probably more to be gained by finding and helping the UHNW people/orgs that are inclined towards EA already.