Not at all, not even close! In most cases, that's wrong even today.
Want to sell something online? A book you wrote, a game you made? There's no way for people to pay you via giro and automatically receiving the good on the page where the payment process was initiated.
Giro is not instant, and almost no bank will offer an API that signals that a specific customer has transferred funds successfully. It always takes hours, and the confirmation process is almost always only semi-automatic for the seller.
Visa/MasterCard/PayPal/Twint/Tikkie/Wero have and will provide actual value. Giro was nice 15 years ago, but hasn't kept up.
And even for money transfers between two private individuals, giro is the inferior system - mainly because Euro banks fail at UX/UI. I don't know a single bank that offers an "address book" in their online banking app/website. If you want to send someone money, you better remember their IBAN yourself. And because the system comes with a degree of anonymity, you can't even send people money back! Their IBAN is not part of the metadata of an incoming transfer, the only way to send money back is to contact that person and have them send their IBAN.