This is actually a pretty common model nowadays, as it saves the commissioning authorities quite some money compared to running actual local trains. See https:/

This is actually a pretty common model nowadays, as it saves the commissioning authorities quite some money compared to running actual local trains. See https://www.bahn.de/service/individuelle-reise/bahn_und_fahrrad/nahverkehrsfreigabe https://www.bahn.de/service/individuelle-reise/bahn_und_fahr... for an overview. People are used to use a regional ticket with those trains, and they show an "RE" number. This will likely lead to loads of discussions on the train if they will follow through with that.