If you are considering the switch from Anki to SuperMemo, then you might find this article useful: "How I Moved My Anki Collection with Over 50,000 Cards to SuperMemo".
It can be found here: https://bookuctivity.wordpress.com/...-with-an-anki-collection-of-over-50000-cards/
It can be found here: https://bookuctivity.wordpress.com/...-with-an-anki-collection-of-over-50000-cards/