The European Union has a mandate that all new cars have to have DAB+ radios factory-fitted (if they have a radio at all, which they universally do now). This has been in place since 2014 and also affects non-EU markets that take European cars, such as the UK, as well as EU markets that have no (official) DAB+ transmissions, such as Ireland. These radios can always receive FM and AM as well, so drivers in non-DAB+ markets just don't use the DAB+ "band".
My car is a 2012 and came with an FM/AM radio, but I took it into the shop to have it retrofitted with a DAB+ radio because that's the direction of travel and the choice of stations and formats is vastly superior. In my area, you go from roughly 7-8 stations across FM and AM to 60+ stations on DAB+, and I'm in an underserved area. Major cities increasingly have 100+ stations.
I can see both sides. Without the mandate, car makers may have continued to just fit the cheapest option, i.e. FM/AM, which stifles progress and competition in broadcasting. But there is now a law saying DAB+ is compulsory on car radios - what happens when DAB+ is yesterday's technology, as is already starting to happen with the advent of 5G? Most of the time when I'm in my car nowadays, I have a 500Mbps or more data connection, more than good enough to stream anything I want. It will end up looking backward, like mandating AM radios would be in 2022.