New Maestro Card haven't been issued in a while. If you'd replace that card now, you'd likely get one cobranded girocard/MasterCard instead of girocard/Maestro. Works just like a credit card online. There's a few banks thag issue girocards with no cobranding, but that's rare.

Even most Sparkassen have started giving out a cobranded Master/Visa by default.

So what you said was true 10 years ago, but likely isn't/soon won't be anymore.