Easier tax fraud mostly to keep your illicitly gained money away from the taxman.

Plus conservative population that is skeptical about new tech and strongly keeps outdated ways of working and doing business (visible in any company there). Letters are common as well and digitalization is pretty weak.

Like what's the last tech product you remember that came out of Austria?

Same reason people DuckDuckGo. They have a stronger connection to the history of snooping on civilians