readefries Merchants also still have to start accepting Mastercards in the Netherlands. Currently most places don't accept both the debit and credit Mastercard.
And starting in 2023, indeed no new Maestro cards will be given out. But all Maestro cards given out before 1-1-2023 will still be accepted till they expire. So around ±2027 the Maestro card will be gone entirely.
Anyway, since Tracy Joëlle Frédérique presumably isn't living in the Netherlands, it's best to get the Mastercard credit.