The article makes a completely different point. It says, if you're travelling from Moscow to Irkutsk don't take the train just because it departs an hour earlier than the plane.
Airports are in relative short supply, so once you've taken the train, your stuck on it for quite a bit.
Migrating away from an ORM or using raw sql queries in addition to an ORM is possible at all times (with more or less work, depending on the ORM you've chosen). So you can start with the train and hop on the plane anytime you want or need.