I actually gave Neon feedback congratulating them on their choice of Mastercard debit. And disagreed with Bank Cler with their choice of a third-party credit card (having its own separate app) instead of going with a debit card.
Because I’m having enough cards to carry around already. For simplicity’s sake. There is no reasonable justification for carrying around more than one card (using the same payment network, e.g. Mastercard), to debit from my account. Except unbundling and price discrimination by banks (“Why consolidate everything into one card, when you can charge high fees for credit cards?”). And there’s no reasonable justification for me to have a Maestro that can’t be used for online purchases, if Mastercard debit exists. And then, many sane countries haven’t had this distinction between Maestro/V PAY debit cards and Mastercard/VISA for years, but been using Mastercard and/or Visa debit as “standard” cards included with a bank account.
Bottom line: Having (separate Mastercard) Maestro cards is a thing from the past.
And while some people might still choose to live in the past (like a couple of the merchants you named) or believe they have to, I don’t. And I don’t think a modern app-controlled bank account should be the place for it.
And while admittedly, I might have worked around the issue of the post office a few times (but very have to make any payments there) and even had a lakeside outdoor restaurant in Zurich not accept card payments once and I certainly won’t dispute your experiences, they aren’t mine either. Personally, I haven’t even had nor used a Swiss Maestro card for at least five years. I usually don’t even carry cash. Migros, coop, the discount supermarket chains (including Denner) as well as the small stores and even the local kebab place I frequent accept Mastercard and VISA.