While removing the driving license carriage requirement is a strict removal of a hassle, I understand where people don't trust the electronic ID card.

Unlike the driving license, you still need to carry it, either in plastic or as an app in your phone. And it's becoming a bit complicated. It's not a self-contained QR code with an electronic signature. It's a whole system that allows you to share only part of the info to someone (e.g. only age in the pub). It also remembers who asked for that info.

Experience from CZ and very fresh. The electronic ID app for instance is still only a few days old.