My spanking new 2021 MBP 16" M1Max 1TB is due to arrive in an hour (or two) 
So, now starting to think about migrating contents from my existing MBP ...
I've deliberately stopped on 10.15.7 but should I now upgrade to any particular o/s before starting the migration?
And what is your recommended choice of migration tool?
So, now starting to think about migrating contents from my existing MBP ...
I've deliberately stopped on 10.15.7 but should I now upgrade to any particular o/s before starting the migration?
And what is your recommended choice of migration tool?