Hi Joey,
We were not talking about linked tables at all. If I understand the question, "its should you put it in OutSystems managed database or leave it in the external database?" That is purely an architectural decision and I go back to the statement on whether other applications are using the data or not.
To address your question about swapping out OutSystems - it doesn't actually impact that. The underlying database is a standard MS SQL or Oracle database.
Stacey