It did actually. I don't pay for sending a message or calling my neighbour if I go to the next country or Bulgaria. The EU made it law that roaming is free.

What still costs money is if you send a message in the NL to the NL if you have a Belgian number for example, which makes it so that you still have to get a new number each time you move countries. Or rather the bigger pain is calling my mom who lives in a different member state, that I can't really do without incurring insane charges.