Just because you may not always use the database with the BEGIN/COMMIT semantics, that absolutely does not mean that "MVCC has almost no bearing on what they ar

Just because you may not always use the database with the BEGIN/COMMIT semantics, that absolutely does not mean that "MVCC has almost no bearing on what they are doing". MVCC and how it has been implemented in the two storage engines in discussion here absolutely has a lot to do with it.