Simplifying tenant to tenant migration with one cmdlet where you don't specify destination site (but rather it gets created if it does not exist) would be much better than to do it via GUI, especially when you do not want to migrate all sites, but you have a lot of them (eg 800 out of 1000).
Simplifying tenant to tenant migration with one cmdlet where you don't specify destination site (but rather it gets created if it does not exist) would be much better than to do it via GUI, especially when you do not want to migrate all sites, but you have a lot of them (eg 800 out of 1000).