Here is a sentence I'd like to fully understand.
The main change has been the shift from domestic vacations to ones overseas.
I think this sentence is more likely to emphasize the duration even though there's nothing referring to it. It implies that the change started in the past and exists even now. So, it would be natural for a reader or listener to think this change is nothing unexpected.
The main change is the shift from domestic vacations to ones overseas.
This sentence is more likely to focuse on now. It doesn't matter if the change was the shift in years gone by. It just gives information emphasizing nothing.
I'd like to know if I'm right to think this way.
Thanks in advance.