At the moment the new dataverse connector is in Preview. When this goes GA, the new actions and triggers will be the only available ones and the legacy ones will be hidden. Workflows using the legacy actions will continue to work until we fully decommission the legacy actions which is about one year from now. So customers will need to migrate to the new actions and triggers at some point.
The new Dataverse connector will go GA soon. I will update the date in this thread once I have a confirmation.
Hope this helps! Feel free to reach out to me if you have any questions or concerns.