Earlier quoted context omitted.
Europe has a working system of direct bank transfers that are used all the time by most everyone. Europeans basically never use checks. A lot of Americans here are really confused because America does not have this infrastructure but it exists in Europe and people already use it all the time.
I am European too and while we have better payment systems than in the US it's far from perfect. If you're referring to a SEPA transfer it is at least an order of magnitude more friction than handing over cash to someone.
They’re used by people of all age, as far as I can tell; the only time I witnessed a problem with it, was when a ~50 year old man had to pay me 600€ for stuff he bought, and I ended up having to take cash. Worth noting that person who paid me is a house painter, a job with a great potential for being paid cash to evade taxes to begin with…